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Finding the Fourth Proportional to 892.98, 1,340.82 and 545.79

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Solution

The fourth proportional to 892.98, 1,340.82 and 545.79 is: 819.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.98 : 1,340.82 = 545.79 : x
  2. Step 2: Convert to fraction form
    892.98/1,340.82 = 545.79/x
  3. Step 3: Cross multiply
    892.98x = 1,340.82 × 545.79
  4. Step 4: Simplify right side
    892.98x = 731,806.15
  5. Step 5: Solve for x
    x = 731,806.15/892.98
  6. Step 6: Final answer
    x = 819.51

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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.