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Finding the Fourth Proportional to 1,641.90, 2,463.04 and 667.86

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Solution

The fourth proportional to 1,641.90, 2,463.04 and 667.86 is: 1,001.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,641.90 : 2,463.04 = 667.86 : x
  2. Step 2: Convert to fraction form
    1,641.90/2,463.04 = 667.86/x
  3. Step 3: Cross multiply
    1,641.90x = 2,463.04 × 667.86
  4. Step 4: Simplify right side
    1,641.90x = 1,644,965.89
  5. Step 5: Solve for x
    x = 1,644,965.89/1,641.90
  6. Step 6: Final answer
    x = 1,001.87

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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.