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Finding the Fourth Proportional to 912.44, 1,372.14 and 727.76

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Solution

The fourth proportional to 912.44, 1,372.14 and 727.76 is: 1,094.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.44 : 1,372.14 = 727.76 : x
  2. Step 2: Convert to fraction form
    912.44/1,372.14 = 727.76/x
  3. Step 3: Cross multiply
    912.44x = 1,372.14 × 727.76
  4. Step 4: Simplify right side
    912.44x = 998,588.61
  5. Step 5: Solve for x
    x = 998,588.61/912.44
  6. Step 6: Final answer
    x = 1,094.42

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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.