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Finding the Fourth Proportional to 715,062.60, 986,792.76 and 392,779.26

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Solution

The fourth proportional to 715,062.60, 986,792.76 and 392,779.26 is: 542,038.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,062.60 : 986,792.76 = 392,779.26 : x
  2. Step 2: Convert to fraction form
    715,062.60/986,792.76 = 392,779.26/x
  3. Step 3: Cross multiply
    715,062.60x = 986,792.76 × 392,779.26
  4. Step 4: Simplify right side
    715,062.60x = 387,591,730,046.16
  5. Step 5: Solve for x
    x = 387,591,730,046.16/715,062.60
  6. Step 6: Final answer
    x = 542,038.88

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1.5x scale

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.