Home / 1,660.15-2,290.49-961.39

Finding the Fourth Proportional to 1,660.15, 2,290.49 and 961.39

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Solution

The fourth proportional to 1,660.15, 2,290.49 and 961.39 is: 1,326.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,660.15 : 2,290.49 = 961.39 : x
  2. Step 2: Convert to fraction form
    1,660.15/2,290.49 = 961.39/x
  3. Step 3: Cross multiply
    1,660.15x = 2,290.49 × 961.39
  4. Step 4: Simplify right side
    1,660.15x = 2,202,042.73
  5. Step 5: Solve for x
    x = 2,202,042.73/1,660.15
  6. Step 6: Final answer
    x = 1,326.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.