Home / 1,991.40-2,747.94-1,151.76

Finding the Fourth Proportional to 1,991.40, 2,747.94 and 1,151.76

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Solution

The fourth proportional to 1,991.40, 2,747.94 and 1,151.76 is: 1,589.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.40 : 2,747.94 = 1,151.76 : x
  2. Step 2: Convert to fraction form
    1,991.40/2,747.94 = 1,151.76/x
  3. Step 3: Cross multiply
    1,991.40x = 2,747.94 × 1,151.76
  4. Step 4: Simplify right side
    1,991.40x = 3,164,967.37
  5. Step 5: Solve for x
    x = 3,164,967.37/1,991.40
  6. Step 6: Final answer
    x = 1,589.32

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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.