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Finding the Fourth Proportional to 391,397.31, 586,910.92 and 151,623.51

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Solution

The fourth proportional to 391,397.31, 586,910.92 and 151,623.51 is: 227,363.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,397.31 : 586,910.92 = 151,623.51 : x
  2. Step 2: Convert to fraction form
    391,397.31/586,910.92 = 151,623.51/x
  3. Step 3: Cross multiply
    391,397.31x = 586,910.92 × 151,623.51
  4. Step 4: Simplify right side
    391,397.31x = 88,989,493,747.73
  5. Step 5: Solve for x
    x = 88,989,493,747.73/391,397.31
  6. Step 6: Final answer
    x = 227,363.58

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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.