Home / 713,781.52-985,046.07-391,505.20

Finding the Fourth Proportional to 713,781.52, 985,046.07 and 391,505.20

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Solution

The fourth proportional to 713,781.52, 985,046.07 and 391,505.20 is: 540,292.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,781.52 : 985,046.07 = 391,505.20 : x
  2. Step 2: Convert to fraction form
    713,781.52/985,046.07 = 391,505.20/x
  3. Step 3: Cross multiply
    713,781.52x = 985,046.07 × 391,505.20
  4. Step 4: Simplify right side
    713,781.52x = 385,650,658,644.56
  5. Step 5: Solve for x
    x = 385,650,658,644.56/713,781.52
  6. Step 6: Final answer
    x = 540,292.30

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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.