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Finding the Fourth Proportional to 715,549.68, 987,480.78 and 393,253.92

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Solution

The fourth proportional to 715,549.68, 987,480.78 and 393,253.92 is: 542,702.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,549.68 : 987,480.78 = 393,253.92 : x
  2. Step 2: Convert to fraction form
    715,549.68/987,480.78 = 393,253.92/x
  3. Step 3: Cross multiply
    715,549.68x = 987,480.78 × 393,253.92
  4. Step 4: Simplify right side
    715,549.68x = 388,330,687,659.66
  5. Step 5: Solve for x
    x = 388,330,687,659.66/715,549.68
  6. Step 6: Final answer
    x = 542,702.62

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1.5x scale

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.