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Finding the Fourth Proportional to 2,338.91, 3,508.79 and 672.95

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Solution

The fourth proportional to 2,338.91, 3,508.79 and 672.95 is: 1,009.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,338.91 : 3,508.79 = 672.95 : x
  2. Step 2: Convert to fraction form
    2,338.91/3,508.79 = 672.95/x
  3. Step 3: Cross multiply
    2,338.91x = 3,508.79 × 672.95
  4. Step 4: Simplify right side
    2,338.91x = 2,361,245.64
  5. Step 5: Solve for x
    x = 2,361,245.64/2,338.91
  6. Step 6: Final answer
    x = 1,009.55

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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.