Home / 2,121.78-3,180.36-734.70

Finding the Fourth Proportional to 2,121.78, 3,180.36 and 734.70

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Solution

The fourth proportional to 2,121.78, 3,180.36 and 734.70 is: 1,101.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.78 : 3,180.36 = 734.70 : x
  2. Step 2: Convert to fraction form
    2,121.78/3,180.36 = 734.70/x
  3. Step 3: Cross multiply
    2,121.78x = 3,180.36 × 734.70
  4. Step 4: Simplify right side
    2,121.78x = 2,336,610.49
  5. Step 5: Solve for x
    x = 2,336,610.49/2,121.78
  6. Step 6: Final answer
    x = 1,101.25

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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.