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Finding the Fourth Proportional to 203.95, 305.96 and 65.14

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Solution

The fourth proportional to 203.95, 305.96 and 65.14 is: 97.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.95 : 305.96 = 65.14 : x
  2. Step 2: Convert to fraction form
    203.95/305.96 = 65.14/x
  3. Step 3: Cross multiply
    203.95x = 305.96 × 65.14
  4. Step 4: Simplify right side
    203.95x = 19,930.23
  5. Step 5: Solve for x
    x = 19,930.23/203.95
  6. Step 6: Final answer
    x = 97.72

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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.