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Finding the Fourth Proportional to 927.73, 1,280.26 and 691.88

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Solution

The fourth proportional to 927.73, 1,280.26 and 691.88 is: 954.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.73 : 1,280.26 = 691.88 : x
  2. Step 2: Convert to fraction form
    927.73/1,280.26 = 691.88/x
  3. Step 3: Cross multiply
    927.73x = 1,280.26 × 691.88
  4. Step 4: Simplify right side
    927.73x = 885,786.29
  5. Step 5: Solve for x
    x = 885,786.29/927.73
  6. Step 6: Final answer
    x = 954.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.