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Finding the Fourth Proportional to 395.47, 545.75 and 218.44

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Solution

The fourth proportional to 395.47, 545.75 and 218.44 is: 301.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.47 : 545.75 = 218.44 : x
  2. Step 2: Convert to fraction form
    395.47/545.75 = 218.44/x
  3. Step 3: Cross multiply
    395.47x = 545.75 × 218.44
  4. Step 4: Simplify right side
    395.47x = 119,212.27
  5. Step 5: Solve for x
    x = 119,212.27/395.47
  6. Step 6: Final answer
    x = 301.44

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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.