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Finding the Fourth Proportional to 1,976.54, 2,965.28 and 677.97

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Solution

The fourth proportional to 1,976.54, 2,965.28 and 677.97 is: 1,017.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,976.54 : 2,965.28 = 677.97 : x
  2. Step 2: Convert to fraction form
    1,976.54/2,965.28 = 677.97/x
  3. Step 3: Cross multiply
    1,976.54x = 2,965.28 × 677.97
  4. Step 4: Simplify right side
    1,976.54x = 2,010,367.49
  5. Step 5: Solve for x
    x = 2,010,367.49/1,976.54
  6. Step 6: Final answer
    x = 1,017.12

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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.