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Finding the Fourth Proportional to 487,073.80, 730,265.10 and 187,438.60

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Solution

The fourth proportional to 487,073.80, 730,265.10 and 187,438.60 is: 281,024.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,073.80 : 730,265.10 = 187,438.60 : x
  2. Step 2: Convert to fraction form
    487,073.80/730,265.10 = 187,438.60/x
  3. Step 3: Cross multiply
    487,073.80x = 730,265.10 × 187,438.60
  4. Step 4: Simplify right side
    487,073.80x = 136,879,867,972.86
  5. Step 5: Solve for x
    x = 136,879,867,972.86/487,073.80
  6. Step 6: Final answer
    x = 281,024.90

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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.