Home / 2,160.18-3,240.81-1,236.78

Finding the Fourth Proportional to 2,160.18, 3,240.81 and 1,236.78

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Solution

The fourth proportional to 2,160.18, 3,240.81 and 1,236.78 is: 1,855.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.18 : 3,240.81 = 1,236.78 : x
  2. Step 2: Convert to fraction form
    2,160.18/3,240.81 = 1,236.78/x
  3. Step 3: Cross multiply
    2,160.18x = 3,240.81 × 1,236.78
  4. Step 4: Simplify right side
    2,160.18x = 4,008,168.99
  5. Step 5: Solve for x
    x = 4,008,168.99/2,160.18
  6. Step 6: Final answer
    x = 1,855.48

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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.