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Finding the Fourth Proportional to 552.28, 762.18 and 319.42

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Solution

The fourth proportional to 552.28, 762.18 and 319.42 is: 440.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.28 : 762.18 = 319.42 : x
  2. Step 2: Convert to fraction form
    552.28/762.18 = 319.42/x
  3. Step 3: Cross multiply
    552.28x = 762.18 × 319.42
  4. Step 4: Simplify right side
    552.28x = 243,455.54
  5. Step 5: Solve for x
    x = 243,455.54/552.28
  6. Step 6: Final answer
    x = 440.82

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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.