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Finding the Fourth Proportional to 279.54, 383.49 and 276.57

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Solution

The fourth proportional to 279.54, 383.49 and 276.57 is: 379.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.54 : 383.49 = 276.57 : x
  2. Step 2: Convert to fraction form
    279.54/383.49 = 276.57/x
  3. Step 3: Cross multiply
    279.54x = 383.49 × 276.57
  4. Step 4: Simplify right side
    279.54x = 106,061.83
  5. Step 5: Solve for x
    x = 106,061.83/279.54
  6. Step 6: Final answer
    x = 379.42

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.