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Finding the Fourth Proportional to 552.27, 762.28 and 355.71

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Solution

The fourth proportional to 552.27, 762.28 and 355.71 is: 490.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.27 : 762.28 = 355.71 : x
  2. Step 2: Convert to fraction form
    552.27/762.28 = 355.71/x
  3. Step 3: Cross multiply
    552.27x = 762.28 × 355.71
  4. Step 4: Simplify right side
    552.27x = 271,146.81
  5. Step 5: Solve for x
    x = 271,146.81/552.27
  6. Step 6: Final answer
    x = 490.97

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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.