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Finding the Fourth Proportional to 478,725.30, 717,527.43 and 307,728.90

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Solution

The fourth proportional to 478,725.30, 717,527.43 and 307,728.90 is: 461,233.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,725.30 : 717,527.43 = 307,728.90 : x
  2. Step 2: Convert to fraction form
    478,725.30/717,527.43 = 307,728.90/x
  3. Step 3: Cross multiply
    478,725.30x = 717,527.43 × 307,728.90
  4. Step 4: Simplify right side
    478,725.30x = 220,803,926,753.73
  5. Step 5: Solve for x
    x = 220,803,926,753.73/478,725.30
  6. Step 6: Final answer
    x = 461,233.04

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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.