Home / 1,965.80-2,945.28-1,640.72

Finding the Fourth Proportional to 1,965.80, 2,945.28 and 1,640.72

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Solution

The fourth proportional to 1,965.80, 2,945.28 and 1,640.72 is: 2,458.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,965.80 : 2,945.28 = 1,640.72 : x
  2. Step 2: Convert to fraction form
    1,965.80/2,945.28 = 1,640.72/x
  3. Step 3: Cross multiply
    1,965.80x = 2,945.28 × 1,640.72
  4. Step 4: Simplify right side
    1,965.80x = 4,832,379.80
  5. Step 5: Solve for x
    x = 4,832,379.80/1,965.80
  6. Step 6: Final answer
    x = 2,458.23

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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.