Home / 2,160.20-3,240.30-774.20

Finding the Fourth Proportional to 2,160.20, 3,240.30 and 774.20

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Solution

The fourth proportional to 2,160.20, 3,240.30 and 774.20 is: 1,161.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,160.20 : 3,240.30 = 774.20 : x
  2. Step 2: Convert to fraction form
    2,160.20/3,240.30 = 774.20/x
  3. Step 3: Cross multiply
    2,160.20x = 3,240.30 × 774.20
  4. Step 4: Simplify right side
    2,160.20x = 2,508,640.26
  5. Step 5: Solve for x
    x = 2,508,640.26/2,160.20
  6. Step 6: Final answer
    x = 1,161.30

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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.