Home / 1,991.76-2,748.95-1,206.27

Finding the Fourth Proportional to 1,991.76, 2,748.95 and 1,206.27

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Solution

The fourth proportional to 1,991.76, 2,748.95 and 1,206.27 is: 1,664.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.76 : 2,748.95 = 1,206.27 : x
  2. Step 2: Convert to fraction form
    1,991.76/2,748.95 = 1,206.27/x
  3. Step 3: Cross multiply
    1,991.76x = 2,748.95 × 1,206.27
  4. Step 4: Simplify right side
    1,991.76x = 3,315,969.89
  5. Step 5: Solve for x
    x = 3,315,969.89/1,991.76
  6. Step 6: Final answer
    x = 1,664.84

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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.