Home / 2,161.48-3,240.19-1,172.85

Finding the Fourth Proportional to 2,161.48, 3,240.19 and 1,172.85

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Solution

The fourth proportional to 2,161.48, 3,240.19 and 1,172.85 is: 1,758.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,161.48 : 3,240.19 = 1,172.85 : x
  2. Step 2: Convert to fraction form
    2,161.48/3,240.19 = 1,172.85/x
  3. Step 3: Cross multiply
    2,161.48x = 3,240.19 × 1,172.85
  4. Step 4: Simplify right side
    2,161.48x = 3,800,249.46
  5. Step 5: Solve for x
    x = 3,800,249.46/2,161.48
  6. Step 6: Final answer
    x = 1,758.17

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1.5x scale

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.