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Finding the Fourth Proportional to 1,488.89, 2,234.08 and 667.75

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Solution

The fourth proportional to 1,488.89, 2,234.08 and 667.75 is: 1,001.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,488.89 : 2,234.08 = 667.75 : x
  2. Step 2: Convert to fraction form
    1,488.89/2,234.08 = 667.75/x
  3. Step 3: Cross multiply
    1,488.89x = 2,234.08 × 667.75
  4. Step 4: Simplify right side
    1,488.89x = 1,491,806.92
  5. Step 5: Solve for x
    x = 1,491,806.92/1,488.89
  6. Step 6: Final answer
    x = 1,001.96

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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.