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Finding the Fourth Proportional to 552.20, 762.26 and 355.72

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Solution

The fourth proportional to 552.20, 762.26 and 355.72 is: 491.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.20 : 762.26 = 355.72 : x
  2. Step 2: Convert to fraction form
    552.20/762.26 = 355.72/x
  3. Step 3: Cross multiply
    552.20x = 762.26 × 355.72
  4. Step 4: Simplify right side
    552.20x = 271,151.13
  5. Step 5: Solve for x
    x = 271,151.13/552.20
  6. Step 6: Final answer
    x = 491.04

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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.