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Finding the Fourth Proportional to 229.43, 317.98 and 225.11

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Solution

The fourth proportional to 229.43, 317.98 and 225.11 is: 311.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.43 : 317.98 = 225.11 : x
  2. Step 2: Convert to fraction form
    229.43/317.98 = 225.11/x
  3. Step 3: Cross multiply
    229.43x = 317.98 × 225.11
  4. Step 4: Simplify right side
    229.43x = 71,579.35
  5. Step 5: Solve for x
    x = 71,579.35/229.43
  6. Step 6: Final answer
    x = 311.99

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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.