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Finding the Fourth Proportional to 1,641.16, 2,461.94 and 667.13

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Solution

The fourth proportional to 1,641.16, 2,461.94 and 667.13 is: 1,000.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,641.16 : 2,461.94 = 667.13 : x
  2. Step 2: Convert to fraction form
    1,641.16/2,461.94 = 667.13/x
  3. Step 3: Cross multiply
    1,641.16x = 2,461.94 × 667.13
  4. Step 4: Simplify right side
    1,641.16x = 1,642,430.70
  5. Step 5: Solve for x
    x = 1,642,430.70/1,641.16
  6. Step 6: Final answer
    x = 1,000.78

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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.