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Finding the Fourth Proportional to 306.72, 423.03 and 208.44

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Solution

The fourth proportional to 306.72, 423.03 and 208.44 is: 287.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.72 : 423.03 = 208.44 : x
  2. Step 2: Convert to fraction form
    306.72/423.03 = 208.44/x
  3. Step 3: Cross multiply
    306.72x = 423.03 × 208.44
  4. Step 4: Simplify right side
    306.72x = 88,176.37
  5. Step 5: Solve for x
    x = 88,176.37/306.72
  6. Step 6: Final answer
    x = 287.48

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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.