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Finding the Fourth Proportional to 814.27, 1,220.19 and 607.87

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Solution

The fourth proportional to 814.27, 1,220.19 and 607.87 is: 910.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    814.27 : 1,220.19 = 607.87 : x
  2. Step 2: Convert to fraction form
    814.27/1,220.19 = 607.87/x
  3. Step 3: Cross multiply
    814.27x = 1,220.19 × 607.87
  4. Step 4: Simplify right side
    814.27x = 741,716.90
  5. Step 5: Solve for x
    x = 741,716.90/814.27
  6. Step 6: Final answer
    x = 910.90

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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.