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Finding the Fourth Proportional to 1,691.91, 2,538.27 and 537.66

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Solution

The fourth proportional to 1,691.91, 2,538.27 and 537.66 is: 806.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,691.91 : 2,538.27 = 537.66 : x
  2. Step 2: Convert to fraction form
    1,691.91/2,538.27 = 537.66/x
  3. Step 3: Cross multiply
    1,691.91x = 2,538.27 × 537.66
  4. Step 4: Simplify right side
    1,691.91x = 1,364,726.25
  5. Step 5: Solve for x
    x = 1,364,726.25/1,691.91
  6. Step 6: Final answer
    x = 806.62

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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.