Home / 1,932.75-2,668.58-1,187.70

Finding the Fourth Proportional to 1,932.75, 2,668.58 and 1,187.70

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Solution

The fourth proportional to 1,932.75, 2,668.58 and 1,187.70 is: 1,639.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,932.75 : 2,668.58 = 1,187.70 : x
  2. Step 2: Convert to fraction form
    1,932.75/2,668.58 = 1,187.70/x
  3. Step 3: Cross multiply
    1,932.75x = 2,668.58 × 1,187.70
  4. Step 4: Simplify right side
    1,932.75x = 3,169,473.20
  5. Step 5: Solve for x
    x = 3,169,473.20/1,932.75
  6. Step 6: Final answer
    x = 1,639.88

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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.