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Finding the Fourth Proportional to 395.18, 545.46 and 229.47

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Solution

The fourth proportional to 395.18, 545.46 and 229.47 is: 316.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.18 : 545.46 = 229.47 : x
  2. Step 2: Convert to fraction form
    395.18/545.46 = 229.47/x
  3. Step 3: Cross multiply
    395.18x = 545.46 × 229.47
  4. Step 4: Simplify right side
    395.18x = 125,166.71
  5. Step 5: Solve for x
    x = 125,166.71/395.18
  6. Step 6: Final answer
    x = 316.74

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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.