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Finding the Fourth Proportional to 279.92, 386.04 and 236.18

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Solution

The fourth proportional to 279.92, 386.04 and 236.18 is: 325.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.92 : 386.04 = 236.18 : x
  2. Step 2: Convert to fraction form
    279.92/386.04 = 236.18/x
  3. Step 3: Cross multiply
    279.92x = 386.04 × 236.18
  4. Step 4: Simplify right side
    279.92x = 91,174.93
  5. Step 5: Solve for x
    x = 91,174.93/279.92
  6. Step 6: Final answer
    x = 325.72

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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.