Home / 3,480.12-4,782.15-2,780.28

Finding the Fourth Proportional to 3,480.12, 4,782.15 and 2,780.28

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Solution

The fourth proportional to 3,480.12, 4,782.15 and 2,780.28 is: 3,820.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,480.12 : 4,782.15 = 2,780.28 : x
  2. Step 2: Convert to fraction form
    3,480.12/4,782.15 = 2,780.28/x
  3. Step 3: Cross multiply
    3,480.12x = 4,782.15 × 2,780.28
  4. Step 4: Simplify right side
    3,480.12x = 13,295,716.00
  5. Step 5: Solve for x
    x = 13,295,716.00/3,480.12
  6. Step 6: Final answer
    x = 3,820.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.