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Finding the Fourth Proportional to 203.63, 305.40 and 100.88

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Solution

The fourth proportional to 203.63, 305.40 and 100.88 is: 151.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.63 : 305.40 = 100.88 : x
  2. Step 2: Convert to fraction form
    203.63/305.40 = 100.88/x
  3. Step 3: Cross multiply
    203.63x = 305.40 × 100.88
  4. Step 4: Simplify right side
    203.63x = 30,806.72
  5. Step 5: Solve for x
    x = 30,806.72/203.63
  6. Step 6: Final answer
    x = 151.29

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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.