Home / 1,969.12-2,716.68-1,261.08

Finding the Fourth Proportional to 1,969.12, 2,716.68 and 1,261.08

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Solution

The fourth proportional to 1,969.12, 2,716.68 and 1,261.08 is: 1,739.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,969.12 : 2,716.68 = 1,261.08 : x
  2. Step 2: Convert to fraction form
    1,969.12/2,716.68 = 1,261.08/x
  3. Step 3: Cross multiply
    1,969.12x = 2,716.68 × 1,261.08
  4. Step 4: Simplify right side
    1,969.12x = 3,425,950.81
  5. Step 5: Solve for x
    x = 3,425,950.81/1,969.12
  6. Step 6: Final answer
    x = 1,739.84

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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.