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Finding the Fourth Proportional to 395.16, 545.24 and 220.47

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Solution

The fourth proportional to 395.16, 545.24 and 220.47 is: 304.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.16 : 545.24 = 220.47 : x
  2. Step 2: Convert to fraction form
    395.16/545.24 = 220.47/x
  3. Step 3: Cross multiply
    395.16x = 545.24 × 220.47
  4. Step 4: Simplify right side
    395.16x = 120,207.96
  5. Step 5: Solve for x
    x = 120,207.96/395.16
  6. Step 6: Final answer
    x = 304.20

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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.