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Finding the Fourth Proportional to 452.75, 624.79 and 278.09

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Solution

The fourth proportional to 452.75, 624.79 and 278.09 is: 383.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.75 : 624.79 = 278.09 : x
  2. Step 2: Convert to fraction form
    452.75/624.79 = 278.09/x
  3. Step 3: Cross multiply
    452.75x = 624.79 × 278.09
  4. Step 4: Simplify right side
    452.75x = 173,747.42
  5. Step 5: Solve for x
    x = 173,747.42/452.75
  6. Step 6: Final answer
    x = 383.76

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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.