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Finding the Fourth Proportional to 680.92, 1,017.17 and 571.60

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Solution

The fourth proportional to 680.92, 1,017.17 and 571.60 is: 853.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.92 : 1,017.17 = 571.60 : x
  2. Step 2: Convert to fraction form
    680.92/1,017.17 = 571.60/x
  3. Step 3: Cross multiply
    680.92x = 1,017.17 × 571.60
  4. Step 4: Simplify right side
    680.92x = 581,414.37
  5. Step 5: Solve for x
    x = 581,414.37/680.92
  6. Step 6: Final answer
    x = 853.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.