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Finding the Fourth Proportional to 552.12, 761.49 and 355.29

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Solution

The fourth proportional to 552.12, 761.49 and 355.29 is: 490.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.12 : 761.49 = 355.29 : x
  2. Step 2: Convert to fraction form
    552.12/761.49 = 355.29/x
  3. Step 3: Cross multiply
    552.12x = 761.49 × 355.29
  4. Step 4: Simplify right side
    552.12x = 270,549.78
  5. Step 5: Solve for x
    x = 270,549.78/552.12
  6. Step 6: Final answer
    x = 490.02

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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.