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Finding the Fourth Proportional to 229.14, 317.61 and 225.72

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Solution

The fourth proportional to 229.14, 317.61 and 225.72 is: 312.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.14 : 317.61 = 225.72 : x
  2. Step 2: Convert to fraction form
    229.14/317.61 = 225.72/x
  3. Step 3: Cross multiply
    229.14x = 317.61 × 225.72
  4. Step 4: Simplify right side
    229.14x = 71,690.93
  5. Step 5: Solve for x
    x = 71,690.93/229.14
  6. Step 6: Final answer
    x = 312.87

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.