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Finding the Fourth Proportional to 305.73, 422.03 and 239.18

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Solution

The fourth proportional to 305.73, 422.03 and 239.18 is: 330.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.73 : 422.03 = 239.18 : x
  2. Step 2: Convert to fraction form
    305.73/422.03 = 239.18/x
  3. Step 3: Cross multiply
    305.73x = 422.03 × 239.18
  4. Step 4: Simplify right side
    305.73x = 100,937.83
  5. Step 5: Solve for x
    x = 100,937.83/305.73
  6. Step 6: Final answer
    x = 330.15

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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.