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Finding the Fourth Proportional to 225.56, 311.30 and 137.06

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Solution

The fourth proportional to 225.56, 311.30 and 137.06 is: 189.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.56 : 311.30 = 137.06 : x
  2. Step 2: Convert to fraction form
    225.56/311.30 = 137.06/x
  3. Step 3: Cross multiply
    225.56x = 311.30 × 137.06
  4. Step 4: Simplify right side
    225.56x = 42,666.78
  5. Step 5: Solve for x
    x = 42,666.78/225.56
  6. Step 6: Final answer
    x = 189.16

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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.