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Finding the Fourth Proportional to 679.28, 1,018.92 and 294.52

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Solution

The fourth proportional to 679.28, 1,018.92 and 294.52 is: 441.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.28 : 1,018.92 = 294.52 : x
  2. Step 2: Convert to fraction form
    679.28/1,018.92 = 294.52/x
  3. Step 3: Cross multiply
    679.28x = 1,018.92 × 294.52
  4. Step 4: Simplify right side
    679.28x = 300,092.32
  5. Step 5: Solve for x
    x = 300,092.32/679.28
  6. Step 6: Final answer
    x = 441.78

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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.