Home / 1,591.38-2,195.84-961.81

Finding the Fourth Proportional to 1,591.38, 2,195.84 and 961.81

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Solution

The fourth proportional to 1,591.38, 2,195.84 and 961.81 is: 1,327.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,591.38 : 2,195.84 = 961.81 : x
  2. Step 2: Convert to fraction form
    1,591.38/2,195.84 = 961.81/x
  3. Step 3: Cross multiply
    1,591.38x = 2,195.84 × 961.81
  4. Step 4: Simplify right side
    1,591.38x = 2,111,977.79
  5. Step 5: Solve for x
    x = 2,111,977.79/1,591.38
  6. Step 6: Final answer
    x = 1,327.14

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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.