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Finding the Fourth Proportional to 452.78, 675.90 and 418.49

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Solution

The fourth proportional to 452.78, 675.90 and 418.49 is: 624.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.78 : 675.90 = 418.49 : x
  2. Step 2: Convert to fraction form
    452.78/675.90 = 418.49/x
  3. Step 3: Cross multiply
    452.78x = 675.90 × 418.49
  4. Step 4: Simplify right side
    452.78x = 282,857.39
  5. Step 5: Solve for x
    x = 282,857.39/452.78
  6. Step 6: Final answer
    x = 624.71

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.