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Finding the Fourth Proportional to 363.54, 501.81 and 280.55

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Solution

The fourth proportional to 363.54, 501.81 and 280.55 is: 387.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    363.54 : 501.81 = 280.55 : x
  2. Step 2: Convert to fraction form
    363.54/501.81 = 280.55/x
  3. Step 3: Cross multiply
    363.54x = 501.81 × 280.55
  4. Step 4: Simplify right side
    363.54x = 140,780.29
  5. Step 5: Solve for x
    x = 140,780.29/363.54
  6. Step 6: Final answer
    x = 387.25

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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.