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Finding the Fourth Proportional to 391,224.07, 539,859.46 and 238,245.31

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Solution

The fourth proportional to 391,224.07, 539,859.46 and 238,245.31 is: 328,760.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,224.07 : 539,859.46 = 238,245.31 : x
  2. Step 2: Convert to fraction form
    391,224.07/539,859.46 = 238,245.31/x
  3. Step 3: Cross multiply
    391,224.07x = 539,859.46 × 238,245.31
  4. Step 4: Simplify right side
    391,224.07x = 128,618,984,404.13
  5. Step 5: Solve for x
    x = 128,618,984,404.13/391,224.07
  6. Step 6: Final answer
    x = 328,760.41

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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.