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Finding the Fourth Proportional to 1,098.90, 1,516.50 and 656.85

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Solution

The fourth proportional to 1,098.90, 1,516.50 and 656.85 is: 906.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098.90 : 1,516.50 = 656.85 : x
  2. Step 2: Convert to fraction form
    1,098.90/1,516.50 = 656.85/x
  3. Step 3: Cross multiply
    1,098.90x = 1,516.50 × 656.85
  4. Step 4: Simplify right side
    1,098.90x = 996,113.03
  5. Step 5: Solve for x
    x = 996,113.03/1,098.90
  6. Step 6: Final answer
    x = 906.46

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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.