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Finding the Fourth Proportional to 767, 1,149.58 and 279.48

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Solution

The fourth proportional to 767, 1,149.58 and 279.48 is: 418.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    767 : 1,149.58 = 279.48 : x
  2. Step 2: Convert to fraction form
    767/1,149.58 = 279.48/x
  3. Step 3: Cross multiply
    767x = 1,149.58 × 279.48
  4. Step 4: Simplify right side
    767x = 321,284.62
  5. Step 5: Solve for x
    x = 321,284.62/767
  6. Step 6: Final answer
    x = 418.88

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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.