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Finding the Fourth Proportional to 715,612.47, 987,532.52 and 393,322.48

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Solution

The fourth proportional to 715,612.47, 987,532.52 and 393,322.48 is: 542,778.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,612.47 : 987,532.52 = 393,322.48 : x
  2. Step 2: Convert to fraction form
    715,612.47/987,532.52 = 393,322.48/x
  3. Step 3: Cross multiply
    715,612.47x = 987,532.52 × 393,322.48
  4. Step 4: Simplify right side
    715,612.47x = 388,418,735,411.61
  5. Step 5: Solve for x
    x = 388,418,735,411.61/715,612.47
  6. Step 6: Final answer
    x = 542,778.05

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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.