Home / 1,268.84-1,757.78-1,238.60

Finding the Fourth Proportional to 1,268.84, 1,757.78 and 1,238.60

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Solution

The fourth proportional to 1,268.84, 1,757.78 and 1,238.60 is: 1,715.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.84 : 1,757.78 = 1,238.60 : x
  2. Step 2: Convert to fraction form
    1,268.84/1,757.78 = 1,238.60/x
  3. Step 3: Cross multiply
    1,268.84x = 1,757.78 × 1,238.60
  4. Step 4: Simplify right side
    1,268.84x = 2,177,186.31
  5. Step 5: Solve for x
    x = 2,177,186.31/1,268.84
  6. Step 6: Final answer
    x = 1,715.89

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.