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Finding the Fourth Proportional to 927.62, 1,272.80 and 918.92

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Solution

The fourth proportional to 927.62, 1,272.80 and 918.92 is: 1,260.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.62 : 1,272.80 = 918.92 : x
  2. Step 2: Convert to fraction form
    927.62/1,272.80 = 918.92/x
  3. Step 3: Cross multiply
    927.62x = 1,272.80 × 918.92
  4. Step 4: Simplify right side
    927.62x = 1,169,601.38
  5. Step 5: Solve for x
    x = 1,169,601.38/927.62
  6. Step 6: Final answer
    x = 1,260.86

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.