Home / 1,660.34-2,290.91-961.31

Finding the Fourth Proportional to 1,660.34, 2,290.91 and 961.31

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Solution

The fourth proportional to 1,660.34, 2,290.91 and 961.31 is: 1,326.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,660.34 : 2,290.91 = 961.31 : x
  2. Step 2: Convert to fraction form
    1,660.34/2,290.91 = 961.31/x
  3. Step 3: Cross multiply
    1,660.34x = 2,290.91 × 961.31
  4. Step 4: Simplify right side
    1,660.34x = 2,202,275.61
  5. Step 5: Solve for x
    x = 2,202,275.61/1,660.34
  6. Step 6: Final answer
    x = 1,326.40

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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.