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Finding the Fourth Proportional to 487,760.60, 731,640.90 and 207,241.40

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Solution

The fourth proportional to 487,760.60, 731,640.90 and 207,241.40 is: 310,862.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,760.60 : 731,640.90 = 207,241.40 : x
  2. Step 2: Convert to fraction form
    487,760.60/731,640.90 = 207,241.40/x
  3. Step 3: Cross multiply
    487,760.60x = 731,640.90 × 207,241.40
  4. Step 4: Simplify right side
    487,760.60x = 151,626,284,413.26
  5. Step 5: Solve for x
    x = 151,626,284,413.26/487,760.60
  6. Step 6: Final answer
    x = 310,862.10

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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.