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Finding the Fourth Proportional to 391,405.11, 586,922.58 and 151,631.31

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Solution

The fourth proportional to 391,405.11, 586,922.58 and 151,631.31 is: 227,375.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,405.11 : 586,922.58 = 151,631.31 : x
  2. Step 2: Convert to fraction form
    391,405.11/586,922.58 = 151,631.31/x
  3. Step 3: Cross multiply
    391,405.11x = 586,922.58 × 151,631.31
  4. Step 4: Simplify right side
    391,405.11x = 88,995,839,673.98
  5. Step 5: Solve for x
    x = 88,995,839,673.98/391,405.11
  6. Step 6: Final answer
    x = 227,375.26

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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.