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Finding the Fourth Proportional to 395.37, 545.54 and 229.55

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Solution

The fourth proportional to 395.37, 545.54 and 229.55 is: 316.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.37 : 545.54 = 229.55 : x
  2. Step 2: Convert to fraction form
    395.37/545.54 = 229.55/x
  3. Step 3: Cross multiply
    395.37x = 545.54 × 229.55
  4. Step 4: Simplify right side
    395.37x = 125,228.71
  5. Step 5: Solve for x
    x = 125,228.71/395.37
  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.