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Finding the Fourth Proportional to 279.33, 387.26 and 265.47

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Solution

The fourth proportional to 279.33, 387.26 and 265.47 is: 368.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.33 : 387.26 = 265.47 : x
  2. Step 2: Convert to fraction form
    279.33/387.26 = 265.47/x
  3. Step 3: Cross multiply
    279.33x = 387.26 × 265.47
  4. Step 4: Simplify right side
    279.33x = 102,805.91
  5. Step 5: Solve for x
    x = 102,805.91/279.33
  6. Step 6: Final answer
    x = 368.04

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.