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Finding the Fourth Proportional to 487,686.80, 731,456.28 and 132,728.48

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Solution

The fourth proportional to 487,686.80, 731,456.28 and 132,728.48 is: 199,072.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,686.80 : 731,456.28 = 132,728.48 : x
  2. Step 2: Convert to fraction form
    487,686.80/731,456.28 = 132,728.48/x
  3. Step 3: Cross multiply
    487,686.80x = 731,456.28 × 132,728.48
  4. Step 4: Simplify right side
    487,686.80x = 97,085,076,573.57
  5. Step 5: Solve for x
    x = 97,085,076,573.57/487,686.80
  6. Step 6: Final answer
    x = 199,072.60

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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.