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Finding the Fourth Proportional to 225.16, 310.28 and 159.55

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Solution

The fourth proportional to 225.16, 310.28 and 159.55 is: 219.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.16 : 310.28 = 159.55 : x
  2. Step 2: Convert to fraction form
    225.16/310.28 = 159.55/x
  3. Step 3: Cross multiply
    225.16x = 310.28 × 159.55
  4. Step 4: Simplify right side
    225.16x = 49,503.60
  5. Step 5: Solve for x
    x = 49,503.60/225.16
  6. Step 6: Final answer
    x = 219.86

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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.