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Finding the Fourth Proportional to 306.55, 423.04 and 173.82

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Solution

The fourth proportional to 306.55, 423.04 and 173.82 is: 239.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.55 : 423.04 = 173.82 : x
  2. Step 2: Convert to fraction form
    306.55/423.04 = 173.82/x
  3. Step 3: Cross multiply
    306.55x = 423.04 × 173.82
  4. Step 4: Simplify right side
    306.55x = 73,532.81
  5. Step 5: Solve for x
    x = 73,532.81/306.55
  6. Step 6: Final answer
    x = 239.87

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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.