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Finding the Fourth Proportional to 391,127.66, 586,686.53 and 124,884.80

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Solution

The fourth proportional to 391,127.66, 586,686.53 and 124,884.80 is: 187,325.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,127.66 : 586,686.53 = 124,884.80 : x
  2. Step 2: Convert to fraction form
    391,127.66/586,686.53 = 124,884.80/x
  3. Step 3: Cross multiply
    391,127.66x = 586,686.53 × 124,884.80
  4. Step 4: Simplify right side
    391,127.66x = 73,268,227,028.31
  5. Step 5: Solve for x
    x = 73,268,227,028.31/391,127.66
  6. Step 6: Final answer
    x = 187,325.61

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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.