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Finding the Fourth Proportional to 306.48, 422.40 and 236.52

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Solution

The fourth proportional to 306.48, 422.40 and 236.52 is: 325.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.48 : 422.40 = 236.52 : x
  2. Step 2: Convert to fraction form
    306.48/422.40 = 236.52/x
  3. Step 3: Cross multiply
    306.48x = 422.40 × 236.52
  4. Step 4: Simplify right side
    306.48x = 99,906.05
  5. Step 5: Solve for x
    x = 99,906.05/306.48
  6. Step 6: Final answer
    x = 325.98

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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.