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Finding the Fourth Proportional to 225.45, 310.86 and 159.84

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Solution

The fourth proportional to 225.45, 310.86 and 159.84 is: 220.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.45 : 310.86 = 159.84 : x
  2. Step 2: Convert to fraction form
    225.45/310.86 = 159.84/x
  3. Step 3: Cross multiply
    225.45x = 310.86 × 159.84
  4. Step 4: Simplify right side
    225.45x = 49,687.86
  5. Step 5: Solve for x
    x = 49,687.86/225.45
  6. Step 6: Final answer
    x = 220.39

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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.