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Finding the Fourth Proportional to 1,785.97, 2,678.92 and 965.85

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Solution

The fourth proportional to 1,785.97, 2,678.92 and 965.85 is: 1,448.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,785.97 : 2,678.92 = 965.85 : x
  2. Step 2: Convert to fraction form
    1,785.97/2,678.92 = 965.85/x
  3. Step 3: Cross multiply
    1,785.97x = 2,678.92 × 965.85
  4. Step 4: Simplify right side
    1,785.97x = 2,587,434.88
  5. Step 5: Solve for x
    x = 2,587,434.88/1,785.97
  6. Step 6: Final answer
    x = 1,448.76

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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.