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Finding the Fourth Proportional to 613.87, 847.17 and 445.91

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Solution

The fourth proportional to 613.87, 847.17 and 445.91 is: 615.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.87 : 847.17 = 445.91 : x
  2. Step 2: Convert to fraction form
    613.87/847.17 = 445.91/x
  3. Step 3: Cross multiply
    613.87x = 847.17 × 445.91
  4. Step 4: Simplify right side
    613.87x = 377,761.57
  5. Step 5: Solve for x
    x = 377,761.57/613.87
  6. Step 6: Final answer
    x = 615.38

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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.