Home / 1,268.80-1,901.78-1,122.93

Finding the Fourth Proportional to 1,268.80, 1,901.78 and 1,122.93

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Solution

The fourth proportional to 1,268.80, 1,901.78 and 1,122.93 is: 1,683.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.80 : 1,901.78 = 1,122.93 : x
  2. Step 2: Convert to fraction form
    1,268.80/1,901.78 = 1,122.93/x
  3. Step 3: Cross multiply
    1,268.80x = 1,901.78 × 1,122.93
  4. Step 4: Simplify right side
    1,268.80x = 2,135,564.41
  5. Step 5: Solve for x
    x = 2,135,564.41/1,268.80
  6. Step 6: Final answer
    x = 1,683.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.