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Finding the Fourth Proportional to 423.72, 636.22 and 250.68

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Solution

The fourth proportional to 423.72, 636.22 and 250.68 is: 376.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.72 : 636.22 = 250.68 : x
  2. Step 2: Convert to fraction form
    423.72/636.22 = 250.68/x
  3. Step 3: Cross multiply
    423.72x = 636.22 × 250.68
  4. Step 4: Simplify right side
    423.72x = 159,487.63
  5. Step 5: Solve for x
    x = 159,487.63/423.72
  6. Step 6: Final answer
    x = 376.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.