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Finding the Fourth Proportional to 395.39, 545.86 and 271.23

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Solution

The fourth proportional to 395.39, 545.86 and 271.23 is: 374.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.39 : 545.86 = 271.23 : x
  2. Step 2: Convert to fraction form
    395.39/545.86 = 271.23/x
  3. Step 3: Cross multiply
    395.39x = 545.86 × 271.23
  4. Step 4: Simplify right side
    395.39x = 148,053.61
  5. Step 5: Solve for x
    x = 148,053.61/395.39
  6. Step 6: Final answer
    x = 374.45

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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.