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Finding the Fourth Proportional to 1,098.92, 1,516.65 and 626.83

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Solution

The fourth proportional to 1,098.92, 1,516.65 and 626.83 is: 865.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.92 : 1,516.65 = 626.83 : x
  2. Step 2: Convert to fraction form
    1,098.92/1,516.65 = 626.83/x
  3. Step 3: Cross multiply
    1,098.92x = 1,516.65 × 626.83
  4. Step 4: Simplify right side
    1,098.92x = 950,681.72
  5. Step 5: Solve for x
    x = 950,681.72/1,098.92
  6. Step 6: Final answer
    x = 865.11

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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.