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Finding the Fourth Proportional to 225.14, 337.74 and 78.91

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Solution

The fourth proportional to 225.14, 337.74 and 78.91 is: 118.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.14 : 337.74 = 78.91 : x
  2. Step 2: Convert to fraction form
    225.14/337.74 = 78.91/x
  3. Step 3: Cross multiply
    225.14x = 337.74 × 78.91
  4. Step 4: Simplify right side
    225.14x = 26,649.37
  5. Step 5: Solve for x
    x = 26,649.37/225.14
  6. Step 6: Final answer
    x = 118.37

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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.