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Finding the Fourth Proportional to 306.51, 422.96 and 248.43

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Solution

The fourth proportional to 306.51, 422.96 and 248.43 is: 342.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.51 : 422.96 = 248.43 : x
  2. Step 2: Convert to fraction form
    306.51/422.96 = 248.43/x
  3. Step 3: Cross multiply
    306.51x = 422.96 × 248.43
  4. Step 4: Simplify right side
    306.51x = 105,074.71
  5. Step 5: Solve for x
    x = 105,074.71/306.51
  6. Step 6: Final answer
    x = 342.81

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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.