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Finding the Fourth Proportional to 394.39, 545.27 and 377.17

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Solution

The fourth proportional to 394.39, 545.27 and 377.17 is: 521.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.39 : 545.27 = 377.17 : x
  2. Step 2: Convert to fraction form
    394.39/545.27 = 377.17/x
  3. Step 3: Cross multiply
    394.39x = 545.27 × 377.17
  4. Step 4: Simplify right side
    394.39x = 205,654.87
  5. Step 5: Solve for x
    x = 205,654.87/394.39
  6. Step 6: Final answer
    x = 521.46

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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.