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Finding the Fourth Proportional to 220.68, 305.12 and 193.35

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Solution

The fourth proportional to 220.68, 305.12 and 193.35 is: 267.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.68 : 305.12 = 193.35 : x
  2. Step 2: Convert to fraction form
    220.68/305.12 = 193.35/x
  3. Step 3: Cross multiply
    220.68x = 305.12 × 193.35
  4. Step 4: Simplify right side
    220.68x = 58,992.46
  5. Step 5: Solve for x
    x = 58,992.46/220.68
  6. Step 6: Final answer
    x = 267.33

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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.