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Finding the Fourth Proportional to 395.21, 545.42 and 237.87

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Solution

The fourth proportional to 395.21, 545.42 and 237.87 is: 328.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.21 : 545.42 = 237.87 : x
  2. Step 2: Convert to fraction form
    395.21/545.42 = 237.87/x
  3. Step 3: Cross multiply
    395.21x = 545.42 × 237.87
  4. Step 4: Simplify right side
    395.21x = 129,739.65
  5. Step 5: Solve for x
    x = 129,739.65/395.21
  6. Step 6: Final answer
    x = 328.28

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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.