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Finding the Fourth Proportional to 225.68, 311.36 and 137.16

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Solution

The fourth proportional to 225.68, 311.36 and 137.16 is: 189.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.68 : 311.36 = 137.16 : x
  2. Step 2: Convert to fraction form
    225.68/311.36 = 137.16/x
  3. Step 3: Cross multiply
    225.68x = 311.36 × 137.16
  4. Step 4: Simplify right side
    225.68x = 42,706.14
  5. Step 5: Solve for x
    x = 42,706.14/225.68
  6. Step 6: Final answer
    x = 189.23

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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.