Home / 2,135.78-3,205.28-1,440.80

Finding the Fourth Proportional to 2,135.78, 3,205.28 and 1,440.80

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Solution

The fourth proportional to 2,135.78, 3,205.28 and 1,440.80 is: 2,162.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,135.78 : 3,205.28 = 1,440.80 : x
  2. Step 2: Convert to fraction form
    2,135.78/3,205.28 = 1,440.80/x
  3. Step 3: Cross multiply
    2,135.78x = 3,205.28 × 1,440.80
  4. Step 4: Simplify right side
    2,135.78x = 4,618,155.00
  5. Step 5: Solve for x
    x = 4,618,155.00/2,135.78
  6. Step 6: Final answer
    x = 2,162.29

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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.