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Finding the Fourth Proportional to 666,561,208.80, 930,889,867.20 and 666,561,208.80

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Solution

The fourth proportional to 666,561,208.80, 930,889,867.20 and 666,561,208.80 is: 930,889,867.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,561,208.80 : 930,889,867.20 = 666,561,208.80 : x
  2. Step 2: Convert to fraction form
    666,561,208.80/930,889,867.20 = 666,561,208.80/x
  3. Step 3: Cross multiply
    666,561,208.80x = 930,889,867.20 × 666,561,208.80
  4. Step 4: Simplify right side
    666,561,208.80x = 620,495,075,140,503,424
  5. Step 5: Solve for x
    x = 620,495,075,140,503,424/666,561,208.80
  6. Step 6: Final answer
    x = 930,889,867.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.