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Finding the Fourth Proportional to 681.12, 1,022.55 and 566.96

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Solution

The fourth proportional to 681.12, 1,022.55 and 566.96 is: 851.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.12 : 1,022.55 = 566.96 : x
  2. Step 2: Convert to fraction form
    681.12/1,022.55 = 566.96/x
  3. Step 3: Cross multiply
    681.12x = 1,022.55 × 566.96
  4. Step 4: Simplify right side
    681.12x = 579,742.11
  5. Step 5: Solve for x
    x = 579,742.11/681.12
  6. Step 6: Final answer
    x = 851.16

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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.