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Finding the Fourth Proportional to 391,156.68, 539,880.45 and 238,245.29

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Solution

The fourth proportional to 391,156.68, 539,880.45 and 238,245.29 is: 328,829.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,156.68 : 539,880.45 = 238,245.29 : x
  2. Step 2: Convert to fraction form
    391,156.68/539,880.45 = 238,245.29/x
  3. Step 3: Cross multiply
    391,156.68x = 539,880.45 × 238,245.29
  4. Step 4: Simplify right side
    391,156.68x = 128,623,974,375.58
  5. Step 5: Solve for x
    x = 128,623,974,375.58/391,156.68
  6. Step 6: Final answer
    x = 328,829.80

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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.