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Finding the Fourth Proportional to 381.42, 572.36 and 165.01

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Solution

The fourth proportional to 381.42, 572.36 and 165.01 is: 247.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.42 : 572.36 = 165.01 : x
  2. Step 2: Convert to fraction form
    381.42/572.36 = 165.01/x
  3. Step 3: Cross multiply
    381.42x = 572.36 × 165.01
  4. Step 4: Simplify right side
    381.42x = 94,445.12
  5. Step 5: Solve for x
    x = 94,445.12/381.42
  6. Step 6: Final answer
    x = 247.61

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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.