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Finding the Fourth Proportional to 552.28, 761.80 and 355.56

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Solution

The fourth proportional to 552.28, 761.80 and 355.56 is: 490.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.28 : 761.80 = 355.56 : x
  2. Step 2: Convert to fraction form
    552.28/761.80 = 355.56/x
  3. Step 3: Cross multiply
    552.28x = 761.80 × 355.56
  4. Step 4: Simplify right side
    552.28x = 270,865.61
  5. Step 5: Solve for x
    x = 270,865.61/552.28
  6. Step 6: Final answer
    x = 490.45

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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.