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Finding the Fourth Proportional to 279.14, 418.08 and 254.84

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Solution

The fourth proportional to 279.14, 418.08 and 254.84 is: 381.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.14 : 418.08 = 254.84 : x
  2. Step 2: Convert to fraction form
    279.14/418.08 = 254.84/x
  3. Step 3: Cross multiply
    279.14x = 418.08 × 254.84
  4. Step 4: Simplify right side
    279.14x = 106,543.51
  5. Step 5: Solve for x
    x = 106,543.51/279.14
  6. Step 6: Final answer
    x = 381.68

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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.