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Finding the Fourth Proportional to 423.28, 634.74 and 179.72

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Solution

The fourth proportional to 423.28, 634.74 and 179.72 is: 269.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.28 : 634.74 = 179.72 : x
  2. Step 2: Convert to fraction form
    423.28/634.74 = 179.72/x
  3. Step 3: Cross multiply
    423.28x = 634.74 × 179.72
  4. Step 4: Simplify right side
    423.28x = 114,074.01
  5. Step 5: Solve for x
    x = 114,074.01/423.28
  6. Step 6: Final answer
    x = 269.50

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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.