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Finding the Fourth Proportional to 381.91, 572.63 and 162.43

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Solution

The fourth proportional to 381.91, 572.63 and 162.43 is: 243.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.91 : 572.63 = 162.43 : x
  2. Step 2: Convert to fraction form
    381.91/572.63 = 162.43/x
  3. Step 3: Cross multiply
    381.91x = 572.63 × 162.43
  4. Step 4: Simplify right side
    381.91x = 93,012.29
  5. Step 5: Solve for x
    x = 93,012.29/381.91
  6. Step 6: Final answer
    x = 243.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.