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Finding the Fourth Proportional to 203.48, 305.12 and 105.88

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Solution

The fourth proportional to 203.48, 305.12 and 105.88 is: 158.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.48 : 305.12 = 105.88 : x
  2. Step 2: Convert to fraction form
    203.48/305.12 = 105.88/x
  3. Step 3: Cross multiply
    203.48x = 305.12 × 105.88
  4. Step 4: Simplify right side
    203.48x = 32,306.11
  5. Step 5: Solve for x
    x = 32,306.11/203.48
  6. Step 6: Final answer
    x = 158.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.