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Finding the Fourth Proportional to 452.31, 624.03 and 255.78

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Solution

The fourth proportional to 452.31, 624.03 and 255.78 is: 352.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.31 : 624.03 = 255.78 : x
  2. Step 2: Convert to fraction form
    452.31/624.03 = 255.78/x
  3. Step 3: Cross multiply
    452.31x = 624.03 × 255.78
  4. Step 4: Simplify right side
    452.31x = 159,614.39
  5. Step 5: Solve for x
    x = 159,614.39/452.31
  6. Step 6: Final answer
    x = 352.89

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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.