Home / 1,991.29-2,749.13-1,330.33

Finding the Fourth Proportional to 1,991.29, 2,749.13 and 1,330.33

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Solution

The fourth proportional to 1,991.29, 2,749.13 and 1,330.33 is: 1,836.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.29 : 2,749.13 = 1,330.33 : x
  2. Step 2: Convert to fraction form
    1,991.29/2,749.13 = 1,330.33/x
  3. Step 3: Cross multiply
    1,991.29x = 2,749.13 × 1,330.33
  4. Step 4: Simplify right side
    1,991.29x = 3,657,250.11
  5. Step 5: Solve for x
    x = 3,657,250.11/1,991.29
  6. Step 6: Final answer
    x = 1,836.62

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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.