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Finding the Fourth Proportional to 485,145.30, 727,717.95 and 307,998.30

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Solution

The fourth proportional to 485,145.30, 727,717.95 and 307,998.30 is: 461,997.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,145.30 : 727,717.95 = 307,998.30 : x
  2. Step 2: Convert to fraction form
    485,145.30/727,717.95 = 307,998.30/x
  3. Step 3: Cross multiply
    485,145.30x = 727,717.95 × 307,998.30
  4. Step 4: Simplify right side
    485,145.30x = 224,135,891,479.49
  5. Step 5: Solve for x
    x = 224,135,891,479.49/485,145.30
  6. Step 6: Final answer
    x = 461,997.45

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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.