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Finding the Fourth Proportional to 275.10, 380.58 and 225.88

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Solution

The fourth proportional to 275.10, 380.58 and 225.88 is: 312.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.10 : 380.58 = 225.88 : x
  2. Step 2: Convert to fraction form
    275.10/380.58 = 225.88/x
  3. Step 3: Cross multiply
    275.10x = 380.58 × 225.88
  4. Step 4: Simplify right side
    275.10x = 85,965.41
  5. Step 5: Solve for x
    x = 85,965.41/275.10
  6. Step 6: Final answer
    x = 312.49

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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.