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Finding the Fourth Proportional to 306.78, 423.42 and 182.51

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Solution

The fourth proportional to 306.78, 423.42 and 182.51 is: 251.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.78 : 423.42 = 182.51 : x
  2. Step 2: Convert to fraction form
    306.78/423.42 = 182.51/x
  3. Step 3: Cross multiply
    306.78x = 423.42 × 182.51
  4. Step 4: Simplify right side
    306.78x = 77,278.38
  5. Step 5: Solve for x
    x = 77,278.38/306.78
  6. Step 6: Final answer
    x = 251.90

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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.