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Finding the Fourth Proportional to 758.08, 1,043.46 and 679.12

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Solution

The fourth proportional to 758.08, 1,043.46 and 679.12 is: 934.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.08 : 1,043.46 = 679.12 : x
  2. Step 2: Convert to fraction form
    758.08/1,043.46 = 679.12/x
  3. Step 3: Cross multiply
    758.08x = 1,043.46 × 679.12
  4. Step 4: Simplify right side
    758.08x = 708,634.56
  5. Step 5: Solve for x
    x = 708,634.56/758.08
  6. Step 6: Final answer
    x = 934.78

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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.