Home / 1,209,750,651.21-1,669,391,131.90-666,574,738.42

Finding the Fourth Proportional to 1,209,750,651.21, 1,669,391,131.90 and 666,574,738.42

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Solution

The fourth proportional to 1,209,750,651.21, 1,669,391,131.90 and 666,574,738.42 is: 919,837,452.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,750,651.21 : 1,669,391,131.90 = 666,574,738.42 : x
  2. Step 2: Convert to fraction form
    1,209,750,651.21/1,669,391,131.90 = 666,574,738.42/x
  3. Step 3: Cross multiply
    1,209,750,651.21x = 1,669,391,131.90 × 666,574,738.42
  4. Step 4: Simplify right side
    1,209,750,651.21x = 1,112,773,957,066,910,208
  5. Step 5: Solve for x
    x = 1,112,773,957,066,910,208/1,209,750,651.21
  6. Step 6: Final answer
    x = 919,837,452.42

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Half scale
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Double scale
Find fourth proportional to 1,209,750,652.21, 1,669,391,133.28 and 666,574,739.42
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.