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Finding the Fourth Proportional to 715,687.92, 987,237.52 and 429,041.48

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Solution

The fourth proportional to 715,687.92, 987,237.52 and 429,041.48 is: 591,830.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,687.92 : 987,237.52 = 429,041.48 : x
  2. Step 2: Convert to fraction form
    715,687.92/987,237.52 = 429,041.48/x
  3. Step 3: Cross multiply
    715,687.92x = 987,237.52 × 429,041.48
  4. Step 4: Simplify right side
    715,687.92x = 423,565,840,683.54
  5. Step 5: Solve for x
    x = 423,565,840,683.54/715,687.92
  6. Step 6: Final answer
    x = 591,830.36

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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.