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Finding the Fourth Proportional to 395.16, 545.26 and 229.30

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Solution

The fourth proportional to 395.16, 545.26 and 229.30 is: 316.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.16 : 545.26 = 229.30 : x
  2. Step 2: Convert to fraction form
    395.16/545.26 = 229.30/x
  3. Step 3: Cross multiply
    395.16x = 545.26 × 229.30
  4. Step 4: Simplify right side
    395.16x = 125,028.12
  5. Step 5: Solve for x
    x = 125,028.12/395.16
  6. Step 6: Final answer
    x = 316.40

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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.