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Finding the Fourth Proportional to 225.40, 338.08 and 71.32

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Solution

The fourth proportional to 225.40, 338.08 and 71.32 is: 106.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.40 : 338.08 = 71.32 : x
  2. Step 2: Convert to fraction form
    225.40/338.08 = 71.32/x
  3. Step 3: Cross multiply
    225.40x = 338.08 × 71.32
  4. Step 4: Simplify right side
    225.40x = 24,111.87
  5. Step 5: Solve for x
    x = 24,111.87/225.40
  6. Step 6: Final answer
    x = 106.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.