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Finding the Fourth Proportional to 997.42, 1,493.91 and 722.88

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Solution

The fourth proportional to 997.42, 1,493.91 and 722.88 is: 1,082.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    997.42 : 1,493.91 = 722.88 : x
  2. Step 2: Convert to fraction form
    997.42/1,493.91 = 722.88/x
  3. Step 3: Cross multiply
    997.42x = 1,493.91 × 722.88
  4. Step 4: Simplify right side
    997.42x = 1,079,918.81
  5. Step 5: Solve for x
    x = 1,079,918.81/997.42
  6. Step 6: Final answer
    x = 1,082.71

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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.