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Finding the Fourth Proportional to 306.57, 426.06 and 303.33

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Solution

The fourth proportional to 306.57, 426.06 and 303.33 is: 421.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.57 : 426.06 = 303.33 : x
  2. Step 2: Convert to fraction form
    306.57/426.06 = 303.33/x
  3. Step 3: Cross multiply
    306.57x = 426.06 × 303.33
  4. Step 4: Simplify right side
    306.57x = 129,236.78
  5. Step 5: Solve for x
    x = 129,236.78/306.57
  6. Step 6: Final answer
    x = 421.56

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.