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Finding the Fourth Proportional to 306.06, 422.35 and 173.28

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Solution

The fourth proportional to 306.06, 422.35 and 173.28 is: 239.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.06 : 422.35 = 173.28 : x
  2. Step 2: Convert to fraction form
    306.06/422.35 = 173.28/x
  3. Step 3: Cross multiply
    306.06x = 422.35 × 173.28
  4. Step 4: Simplify right side
    306.06x = 73,184.81
  5. Step 5: Solve for x
    x = 73,184.81/306.06
  6. Step 6: Final answer
    x = 239.12

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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.