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Finding the Fourth Proportional to 379.48, 523.66 and 281.20

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Solution

The fourth proportional to 379.48, 523.66 and 281.20 is: 388.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.48 : 523.66 = 281.20 : x
  2. Step 2: Convert to fraction form
    379.48/523.66 = 281.20/x
  3. Step 3: Cross multiply
    379.48x = 523.66 × 281.20
  4. Step 4: Simplify right side
    379.48x = 147,253.19
  5. Step 5: Solve for x
    x = 147,253.19/379.48
  6. Step 6: Final answer
    x = 388.04

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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.