Home / 1,991.74-2,748.68-1,363.59

Finding the Fourth Proportional to 1,991.74, 2,748.68 and 1,363.59

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Solution

The fourth proportional to 1,991.74, 2,748.68 and 1,363.59 is: 1,881.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.74 : 2,748.68 = 1,363.59 : x
  2. Step 2: Convert to fraction form
    1,991.74/2,748.68 = 1,363.59/x
  3. Step 3: Cross multiply
    1,991.74x = 2,748.68 × 1,363.59
  4. Step 4: Simplify right side
    1,991.74x = 3,748,072.56
  5. Step 5: Solve for x
    x = 3,748,072.56/1,991.74
  6. Step 6: Final answer
    x = 1,881.81

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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.