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Finding the Fourth Proportional to 927.66, 1,392.44 and 724.48

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Solution

The fourth proportional to 927.66, 1,392.44 and 724.48 is: 1,087.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.66 : 1,392.44 = 724.48 : x
  2. Step 2: Convert to fraction form
    927.66/1,392.44 = 724.48/x
  3. Step 3: Cross multiply
    927.66x = 1,392.44 × 724.48
  4. Step 4: Simplify right side
    927.66x = 1,008,794.93
  5. Step 5: Solve for x
    x = 1,008,794.93/927.66
  6. Step 6: Final answer
    x = 1,087.46

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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.