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Finding the Fourth Proportional to 391,224.57, 539,860.15 and 238,245.81

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Solution

The fourth proportional to 391,224.57, 539,860.15 and 238,245.81 is: 328,761.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,224.57 : 539,860.15 = 238,245.81 : x
  2. Step 2: Convert to fraction form
    391,224.57/539,860.15 = 238,245.81/x
  3. Step 3: Cross multiply
    391,224.57x = 539,860.15 × 238,245.81
  4. Step 4: Simplify right side
    391,224.57x = 128,619,418,723.47
  5. Step 5: Solve for x
    x = 128,619,418,723.47/391,224.57
  6. Step 6: Final answer
    x = 328,761.10

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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.