Home / 1,991.03-2,748.08-1,291.19

Finding the Fourth Proportional to 1,991.03, 2,748.08 and 1,291.19

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Solution

The fourth proportional to 1,991.03, 2,748.08 and 1,291.19 is: 1,782.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.03 : 2,748.08 = 1,291.19 : x
  2. Step 2: Convert to fraction form
    1,991.03/2,748.08 = 1,291.19/x
  3. Step 3: Cross multiply
    1,991.03x = 2,748.08 × 1,291.19
  4. Step 4: Simplify right side
    1,991.03x = 3,548,286.96
  5. Step 5: Solve for x
    x = 3,548,286.96/1,991.03
  6. Step 6: Final answer
    x = 1,782.14

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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.