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Finding the Fourth Proportional to 453.38, 625.85 and 287.57

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Solution

The fourth proportional to 453.38, 625.85 and 287.57 is: 396.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.38 : 625.85 = 287.57 : x
  2. Step 2: Convert to fraction form
    453.38/625.85 = 287.57/x
  3. Step 3: Cross multiply
    453.38x = 625.85 × 287.57
  4. Step 4: Simplify right side
    453.38x = 179,975.68
  5. Step 5: Solve for x
    x = 179,975.68/453.38
  6. Step 6: Final answer
    x = 396.96

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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.