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Finding the Fourth Proportional to 391,685.31, 587,527.97 and 258,534.43

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Solution

The fourth proportional to 391,685.31, 587,527.97 and 258,534.43 is: 387,801.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,685.31 : 587,527.97 = 258,534.43 : x
  2. Step 2: Convert to fraction form
    391,685.31/587,527.97 = 258,534.43/x
  3. Step 3: Cross multiply
    391,685.31x = 587,527.97 × 258,534.43
  4. Step 4: Simplify right side
    391,685.31x = 151,896,205,410.61
  5. Step 5: Solve for x
    x = 151,896,205,410.61/391,685.31
  6. Step 6: Final answer
    x = 387,801.64

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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.