Home / 1,008.20-1,391.39-566.13

Finding the Fourth Proportional to 1,008.20, 1,391.39 and 566.13

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Solution

The fourth proportional to 1,008.20, 1,391.39 and 566.13 is: 781.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.20 : 1,391.39 = 566.13 : x
  2. Step 2: Convert to fraction form
    1,008.20/1,391.39 = 566.13/x
  3. Step 3: Cross multiply
    1,008.20x = 1,391.39 × 566.13
  4. Step 4: Simplify right side
    1,008.20x = 787,704.79
  5. Step 5: Solve for x
    x = 787,704.79/1,008.20
  6. Step 6: Final answer
    x = 781.30

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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.