Home / 2,160.45-3,242.49-1,121.09

Finding the Fourth Proportional to 2,160.45, 3,242.49 and 1,121.09

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Solution

The fourth proportional to 2,160.45, 3,242.49 and 1,121.09 is: 1,682.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.45 : 3,242.49 = 1,121.09 : x
  2. Step 2: Convert to fraction form
    2,160.45/3,242.49 = 1,121.09/x
  3. Step 3: Cross multiply
    2,160.45x = 3,242.49 × 1,121.09
  4. Step 4: Simplify right side
    2,160.45x = 3,635,106.90
  5. Step 5: Solve for x
    x = 3,635,106.90/2,160.45
  6. Step 6: Final answer
    x = 1,682.57

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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.