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Finding the Fourth Proportional to 395.13, 545.27 and 220.47

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Solution

The fourth proportional to 395.13, 545.27 and 220.47 is: 304.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.13 : 545.27 = 220.47 : x
  2. Step 2: Convert to fraction form
    395.13/545.27 = 220.47/x
  3. Step 3: Cross multiply
    395.13x = 545.27 × 220.47
  4. Step 4: Simplify right side
    395.13x = 120,216.23
  5. Step 5: Solve for x
    x = 120,216.23/395.13
  6. Step 6: Final answer
    x = 304.25

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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.