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Finding the Fourth Proportional to 642,546.28, 886,718.82 and 356,071

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Solution

The fourth proportional to 642,546.28, 886,718.82 and 356,071 is: 491,380.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,546.28 : 886,718.82 = 356,071 : x
  2. Step 2: Convert to fraction form
    642,546.28/886,718.82 = 356,071/x
  3. Step 3: Cross multiply
    642,546.28x = 886,718.82 × 356,071
  4. Step 4: Simplify right side
    642,546.28x = 315,734,856,956.22
  5. Step 5: Solve for x
    x = 315,734,856,956.22/642,546.28
  6. Step 6: Final answer
    x = 491,380.73

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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.