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Finding the Fourth Proportional to 249.90, 345.06 and 225.24

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Solution

The fourth proportional to 249.90, 345.06 and 225.24 is: 311.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.90 : 345.06 = 225.24 : x
  2. Step 2: Convert to fraction form
    249.90/345.06 = 225.24/x
  3. Step 3: Cross multiply
    249.90x = 345.06 × 225.24
  4. Step 4: Simplify right side
    249.90x = 77,721.31
  5. Step 5: Solve for x
    x = 77,721.31/249.90
  6. Step 6: Final answer
    x = 311.01

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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.