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Finding the Fourth Proportional to 394.68, 545.14 and 270.75

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Solution

The fourth proportional to 394.68, 545.14 and 270.75 is: 373.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.68 : 545.14 = 270.75 : x
  2. Step 2: Convert to fraction form
    394.68/545.14 = 270.75/x
  3. Step 3: Cross multiply
    394.68x = 545.14 × 270.75
  4. Step 4: Simplify right side
    394.68x = 147,597.89
  5. Step 5: Solve for x
    x = 147,597.89/394.68
  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.