Home / 2,320.13-3,201.78-1,272.20

Finding the Fourth Proportional to 2,320.13, 3,201.78 and 1,272.20

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Solution

The fourth proportional to 2,320.13, 3,201.78 and 1,272.20 is: 1,755.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,320.13 : 3,201.78 = 1,272.20 : x
  2. Step 2: Convert to fraction form
    2,320.13/3,201.78 = 1,272.20/x
  3. Step 3: Cross multiply
    2,320.13x = 3,201.78 × 1,272.20
  4. Step 4: Simplify right side
    2,320.13x = 4,073,288.51
  5. Step 5: Solve for x
    x = 4,073,288.51/2,320.13
  6. Step 6: Final answer
    x = 1,755.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.