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Finding the Fourth Proportional to 393.27, 545.24 and 371.40

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Solution

The fourth proportional to 393.27, 545.24 and 371.40 is: 514.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.27 : 545.24 = 371.40 : x
  2. Step 2: Convert to fraction form
    393.27/545.24 = 371.40/x
  3. Step 3: Cross multiply
    393.27x = 545.24 × 371.40
  4. Step 4: Simplify right side
    393.27x = 202,500.28
  5. Step 5: Solve for x
    x = 202,500.28/393.27
  6. Step 6: Final answer
    x = 514.91

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.