Home / 1,629.36-2,249.01-1,187.28

Finding the Fourth Proportional to 1,629.36, 2,249.01 and 1,187.28

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Solution

The fourth proportional to 1,629.36, 2,249.01 and 1,187.28 is: 1,638.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,629.36 : 2,249.01 = 1,187.28 : x
  2. Step 2: Convert to fraction form
    1,629.36/2,249.01 = 1,187.28/x
  3. Step 3: Cross multiply
    1,629.36x = 2,249.01 × 1,187.28
  4. Step 4: Simplify right side
    1,629.36x = 2,670,204.59
  5. Step 5: Solve for x
    x = 2,670,204.59/1,629.36
  6. Step 6: Final answer
    x = 1,638.81

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1.5x scale

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.