Home / 1,297.08-1,936.20-1,111.19

Finding the Fourth Proportional to 1,297.08, 1,936.20 and 1,111.19

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Solution

The fourth proportional to 1,297.08, 1,936.20 and 1,111.19 is: 1,658.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297.08 : 1,936.20 = 1,111.19 : x
  2. Step 2: Convert to fraction form
    1,297.08/1,936.20 = 1,111.19/x
  3. Step 3: Cross multiply
    1,297.08x = 1,936.20 × 1,111.19
  4. Step 4: Simplify right side
    1,297.08x = 2,151,480.56
  5. Step 5: Solve for x
    x = 2,151,480.56/1,297.08
  6. Step 6: Final answer
    x = 1,658.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.