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Finding the Fourth Proportional to 1,098.64, 1,516.20 and 656.44

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Solution

The fourth proportional to 1,098.64, 1,516.20 and 656.44 is: 905.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.64 : 1,516.20 = 656.44 : x
  2. Step 2: Convert to fraction form
    1,098.64/1,516.20 = 656.44/x
  3. Step 3: Cross multiply
    1,098.64x = 1,516.20 × 656.44
  4. Step 4: Simplify right side
    1,098.64x = 995,294.33
  5. Step 5: Solve for x
    x = 995,294.33/1,098.64
  6. Step 6: Final answer
    x = 905.93

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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.