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Finding the Fourth Proportional to 2,098.48, 3,147.88 and 638.66

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Solution

The fourth proportional to 2,098.48, 3,147.88 and 638.66 is: 958.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,098.48 : 3,147.88 = 638.66 : x
  2. Step 2: Convert to fraction form
    2,098.48/3,147.88 = 638.66/x
  3. Step 3: Cross multiply
    2,098.48x = 3,147.88 × 638.66
  4. Step 4: Simplify right side
    2,098.48x = 2,010,425.04
  5. Step 5: Solve for x
    x = 2,010,425.04/2,098.48
  6. Step 6: Final answer
    x = 958.04

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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.