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Finding the Fourth Proportional to 1,337.29, 2,005.78 and 515.49

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Solution

The fourth proportional to 1,337.29, 2,005.78 and 515.49 is: 773.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,337.29 : 2,005.78 = 515.49 : x
  2. Step 2: Convert to fraction form
    1,337.29/2,005.78 = 515.49/x
  3. Step 3: Cross multiply
    1,337.29x = 2,005.78 × 515.49
  4. Step 4: Simplify right side
    1,337.29x = 1,033,962.97
  5. Step 5: Solve for x
    x = 1,033,962.97/1,337.29
  6. Step 6: Final answer
    x = 773.18

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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.