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Finding the Fourth Proportional to 279.48, 419.94 and 252.84

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Solution

The fourth proportional to 279.48, 419.94 and 252.84 is: 379.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.48 : 419.94 = 252.84 : x
  2. Step 2: Convert to fraction form
    279.48/419.94 = 252.84/x
  3. Step 3: Cross multiply
    279.48x = 419.94 × 252.84
  4. Step 4: Simplify right side
    279.48x = 106,177.63
  5. Step 5: Solve for x
    x = 106,177.63/279.48
  6. Step 6: Final answer
    x = 379.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.