Home / 1,991.45-2,748.08-1,245.38

Finding the Fourth Proportional to 1,991.45, 2,748.08 and 1,245.38

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Solution

The fourth proportional to 1,991.45, 2,748.08 and 1,245.38 is: 1,718.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.45 : 2,748.08 = 1,245.38 : x
  2. Step 2: Convert to fraction form
    1,991.45/2,748.08 = 1,245.38/x
  3. Step 3: Cross multiply
    1,991.45x = 2,748.08 × 1,245.38
  4. Step 4: Simplify right side
    1,991.45x = 3,422,386.24
  5. Step 5: Solve for x
    x = 3,422,386.24/1,991.45
  6. Step 6: Final answer
    x = 1,718.54

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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.