Home / 1,660.39-2,291.08-961.63

Finding the Fourth Proportional to 1,660.39, 2,291.08 and 961.63

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Solution

The fourth proportional to 1,660.39, 2,291.08 and 961.63 is: 1,326.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,660.39 : 2,291.08 = 961.63 : x
  2. Step 2: Convert to fraction form
    1,660.39/2,291.08 = 961.63/x
  3. Step 3: Cross multiply
    1,660.39x = 2,291.08 × 961.63
  4. Step 4: Simplify right side
    1,660.39x = 2,203,171.26
  5. Step 5: Solve for x
    x = 2,203,171.26/1,660.39
  6. Step 6: Final answer
    x = 1,326.90

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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.