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Finding the Fourth Proportional to 423.45, 634.74 and 238.08

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Solution

The fourth proportional to 423.45, 634.74 and 238.08 is: 356.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.45 : 634.74 = 238.08 : x
  2. Step 2: Convert to fraction form
    423.45/634.74 = 238.08/x
  3. Step 3: Cross multiply
    423.45x = 634.74 × 238.08
  4. Step 4: Simplify right side
    423.45x = 151,114.54
  5. Step 5: Solve for x
    x = 151,114.54/423.45
  6. Step 6: Final answer
    x = 356.87

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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.