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Finding the Fourth Proportional to 387.75, 535.29 and 271.53

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Solution

The fourth proportional to 387.75, 535.29 and 271.53 is: 374.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.75 : 535.29 = 271.53 : x
  2. Step 2: Convert to fraction form
    387.75/535.29 = 271.53/x
  3. Step 3: Cross multiply
    387.75x = 535.29 × 271.53
  4. Step 4: Simplify right side
    387.75x = 145,347.29
  5. Step 5: Solve for x
    x = 145,347.29/387.75
  6. Step 6: Final answer
    x = 374.85

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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.