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Finding the Fourth Proportional to 395.75, 545.78 and 271.17

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Solution

The fourth proportional to 395.75, 545.78 and 271.17 is: 373.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.75 : 545.78 = 271.17 : x
  2. Step 2: Convert to fraction form
    395.75/545.78 = 271.17/x
  3. Step 3: Cross multiply
    395.75x = 545.78 × 271.17
  4. Step 4: Simplify right side
    395.75x = 147,997.81
  5. Step 5: Solve for x
    x = 147,997.81/395.75
  6. Step 6: Final answer
    x = 373.97

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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.