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Finding the Fourth Proportional to 306.38, 422.34 and 207.98

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Solution

The fourth proportional to 306.38, 422.34 and 207.98 is: 286.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.38 : 422.34 = 207.98 : x
  2. Step 2: Convert to fraction form
    306.38/422.34 = 207.98/x
  3. Step 3: Cross multiply
    306.38x = 422.34 × 207.98
  4. Step 4: Simplify right side
    306.38x = 87,838.27
  5. Step 5: Solve for x
    x = 87,838.27/306.38
  6. Step 6: Final answer
    x = 286.70

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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.