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Finding the Fourth Proportional to 1,976.65, 2,965.28 and 677.81

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Solution

The fourth proportional to 1,976.65, 2,965.28 and 677.81 is: 1,016.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,976.65 : 2,965.28 = 677.81 : x
  2. Step 2: Convert to fraction form
    1,976.65/2,965.28 = 677.81/x
  3. Step 3: Cross multiply
    1,976.65x = 2,965.28 × 677.81
  4. Step 4: Simplify right side
    1,976.65x = 2,009,896.44
  5. Step 5: Solve for x
    x = 2,009,896.44/1,976.65
  6. Step 6: Final answer
    x = 1,016.82

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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.