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Finding the Fourth Proportional to 362.92, 542.20 and 281.56

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Solution

The fourth proportional to 362.92, 542.20 and 281.56 is: 420.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    362.92 : 542.20 = 281.56 : x
  2. Step 2: Convert to fraction form
    362.92/542.20 = 281.56/x
  3. Step 3: Cross multiply
    362.92x = 542.20 × 281.56
  4. Step 4: Simplify right side
    362.92x = 152,661.83
  5. Step 5: Solve for x
    x = 152,661.83/362.92
  6. Step 6: Final answer
    x = 420.65

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.