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Finding the Fourth Proportional to 306.41, 423.50 and 240.80

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Solution

The fourth proportional to 306.41, 423.50 and 240.80 is: 332.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.41 : 423.50 = 240.80 : x
  2. Step 2: Convert to fraction form
    306.41/423.50 = 240.80/x
  3. Step 3: Cross multiply
    306.41x = 423.50 × 240.80
  4. Step 4: Simplify right side
    306.41x = 101,975.48
  5. Step 5: Solve for x
    x = 101,975.48/306.41
  6. Step 6: Final answer
    x = 332.81

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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.