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Finding the Fourth Proportional to 487,539.90, 731,309.85 and 425,331.90

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Solution

The fourth proportional to 487,539.90, 731,309.85 and 425,331.90 is: 637,997.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,539.90 : 731,309.85 = 425,331.90 : x
  2. Step 2: Convert to fraction form
    487,539.90/731,309.85 = 425,331.90/x
  3. Step 3: Cross multiply
    487,539.90x = 731,309.85 × 425,331.90
  4. Step 4: Simplify right side
    487,539.90x = 311,049,407,989.22
  5. Step 5: Solve for x
    x = 311,049,407,989.22/487,539.90
  6. Step 6: Final answer
    x = 637,997.85

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Similar ratio
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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.