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Finding the Fourth Proportional to 225.51, 311.09 and 151.94

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Solution

The fourth proportional to 225.51, 311.09 and 151.94 is: 209.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.51 : 311.09 = 151.94 : x
  2. Step 2: Convert to fraction form
    225.51/311.09 = 151.94/x
  3. Step 3: Cross multiply
    225.51x = 311.09 × 151.94
  4. Step 4: Simplify right side
    225.51x = 47,264.70
  5. Step 5: Solve for x
    x = 47,264.70/225.51
  6. Step 6: Final answer
    x = 209.59

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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.