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Finding the Fourth Proportional to 225.68, 311.16 and 170.18

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Solution

The fourth proportional to 225.68, 311.16 and 170.18 is: 234.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.68 : 311.16 = 170.18 : x
  2. Step 2: Convert to fraction form
    225.68/311.16 = 170.18/x
  3. Step 3: Cross multiply
    225.68x = 311.16 × 170.18
  4. Step 4: Simplify right side
    225.68x = 52,953.21
  5. Step 5: Solve for x
    x = 52,953.21/225.68
  6. Step 6: Final answer
    x = 234.64

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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.