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Finding the Fourth Proportional to 381.15, 571.82 and 271.53

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Solution

The fourth proportional to 381.15, 571.82 and 271.53 is: 407.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.15 : 571.82 = 271.53 : x
  2. Step 2: Convert to fraction form
    381.15/571.82 = 271.53/x
  3. Step 3: Cross multiply
    381.15x = 571.82 × 271.53
  4. Step 4: Simplify right side
    381.15x = 155,264.93
  5. Step 5: Solve for x
    x = 155,264.93/381.15
  6. Step 6: Final answer
    x = 407.36

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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.