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Finding the Fourth Proportional to 1,845.80, 2,767.84 and 979.88

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Solution

The fourth proportional to 1,845.80, 2,767.84 and 979.88 is: 1,469.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,845.80 : 2,767.84 = 979.88 : x
  2. Step 2: Convert to fraction form
    1,845.80/2,767.84 = 979.88/x
  3. Step 3: Cross multiply
    1,845.80x = 2,767.84 × 979.88
  4. Step 4: Simplify right side
    1,845.80x = 2,712,151.06
  5. Step 5: Solve for x
    x = 2,712,151.06/1,845.80
  6. Step 6: Final answer
    x = 1,469.36

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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.