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Finding the Fourth Proportional to 1,092.41, 1,639.42 and 515.69

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Solution

The fourth proportional to 1,092.41, 1,639.42 and 515.69 is: 773.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,092.41 : 1,639.42 = 515.69 : x
  2. Step 2: Convert to fraction form
    1,092.41/1,639.42 = 515.69/x
  3. Step 3: Cross multiply
    1,092.41x = 1,639.42 × 515.69
  4. Step 4: Simplify right side
    1,092.41x = 845,423.01
  5. Step 5: Solve for x
    x = 845,423.01/1,092.41
  6. Step 6: Final answer
    x = 773.91

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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.