Home / 1,268.70-1,917.41-1,247.13

Finding the Fourth Proportional to 1,268.70, 1,917.41 and 1,247.13

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Solution

The fourth proportional to 1,268.70, 1,917.41 and 1,247.13 is: 1,884.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.70 : 1,917.41 = 1,247.13 : x
  2. Step 2: Convert to fraction form
    1,268.70/1,917.41 = 1,247.13/x
  3. Step 3: Cross multiply
    1,268.70x = 1,917.41 × 1,247.13
  4. Step 4: Simplify right side
    1,268.70x = 2,391,253.30
  5. Step 5: Solve for x
    x = 2,391,253.30/1,268.70
  6. Step 6: Final answer
    x = 1,884.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.