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Finding the Fourth Proportional to 1,098.72, 1,516.68 and 656.73

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Solution

The fourth proportional to 1,098.72, 1,516.68 and 656.73 is: 906.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.72 : 1,516.68 = 656.73 : x
  2. Step 2: Convert to fraction form
    1,098.72/1,516.68 = 656.73/x
  3. Step 3: Cross multiply
    1,098.72x = 1,516.68 × 656.73
  4. Step 4: Simplify right side
    1,098.72x = 996,049.26
  5. Step 5: Solve for x
    x = 996,049.26/1,098.72
  6. Step 6: Final answer
    x = 906.55

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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.