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Finding the Fourth Proportional to 1,658.70, 2,489.22 and 1,226.88

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Solution

The fourth proportional to 1,658.70, 2,489.22 and 1,226.88 is: 1,841.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,658.70 : 2,489.22 = 1,226.88 : x
  2. Step 2: Convert to fraction form
    1,658.70/2,489.22 = 1,226.88/x
  3. Step 3: Cross multiply
    1,658.70x = 2,489.22 × 1,226.88
  4. Step 4: Simplify right side
    1,658.70x = 3,053,974.23
  5. Step 5: Solve for x
    x = 3,053,974.23/1,658.70
  6. Step 6: Final answer
    x = 1,841.19

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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.