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Finding the Fourth Proportional to 487,512.70, 731,269.05 and 171,928.60

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Solution

The fourth proportional to 487,512.70, 731,269.05 and 171,928.60 is: 257,892.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,512.70 : 731,269.05 = 171,928.60 : x
  2. Step 2: Convert to fraction form
    487,512.70/731,269.05 = 171,928.60/x
  3. Step 3: Cross multiply
    487,512.70x = 731,269.05 × 171,928.60
  4. Step 4: Simplify right side
    487,512.70x = 125,726,063,989.83
  5. Step 5: Solve for x
    x = 125,726,063,989.83/487,512.70
  6. Step 6: Final answer
    x = 257,892.90

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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.