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Finding the Fourth Proportional to 279.12, 380.28 and 273.18

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Solution

The fourth proportional to 279.12, 380.28 and 273.18 is: 372.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.12 : 380.28 = 273.18 : x
  2. Step 2: Convert to fraction form
    279.12/380.28 = 273.18/x
  3. Step 3: Cross multiply
    279.12x = 380.28 × 273.18
  4. Step 4: Simplify right side
    279.12x = 103,884.89
  5. Step 5: Solve for x
    x = 103,884.89/279.12
  6. Step 6: Final answer
    x = 372.19

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.