Home / 1,212,301,009.80-1,818,451,514.70-921,735,643.05

Finding the Fourth Proportional to 1,212,301,009.80, 1,818,451,514.70 and 921,735,643.05

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Solution

The fourth proportional to 1,212,301,009.80, 1,818,451,514.70 and 921,735,643.05 is: 1,382,603,464.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212,301,009.80 : 1,818,451,514.70 = 921,735,643.05 : x
  2. Step 2: Convert to fraction form
    1,212,301,009.80/1,818,451,514.70 = 921,735,643.05/x
  3. Step 3: Cross multiply
    1,212,301,009.80x = 1,818,451,514.70 × 921,735,643.05
  4. Step 4: Simplify right side
    1,212,301,009.80x = 1,676,131,576,257,251,072
  5. Step 5: Solve for x
    x = 1,676,131,576,257,251,072/1,212,301,009.80
  6. Step 6: Final answer
    x = 1,382,603,464.58

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.