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Finding the Fourth Proportional to 715,861.25, 987,076.90 and 457,396.73

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Solution

The fourth proportional to 715,861.25, 987,076.90 and 457,396.73 is: 630,688.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,861.25 : 987,076.90 = 457,396.73 : x
  2. Step 2: Convert to fraction form
    715,861.25/987,076.90 = 457,396.73/x
  3. Step 3: Cross multiply
    715,861.25x = 987,076.90 × 457,396.73
  4. Step 4: Simplify right side
    715,861.25x = 451,485,746,318.54
  5. Step 5: Solve for x
    x = 451,485,746,318.54/715,861.25
  6. Step 6: Final answer
    x = 630,688.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.