Home / 2,820.88-3,887.68-2,320.32

Finding the Fourth Proportional to 2,820.88, 3,887.68 and 2,320.32

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Solution

The fourth proportional to 2,820.88, 3,887.68 and 2,320.32 is: 3,197.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.88 : 3,887.68 = 2,320.32 : x
  2. Step 2: Convert to fraction form
    2,820.88/3,887.68 = 2,320.32/x
  3. Step 3: Cross multiply
    2,820.88x = 3,887.68 × 2,320.32
  4. Step 4: Simplify right side
    2,820.88x = 9,020,661.66
  5. Step 5: Solve for x
    x = 9,020,661.66/2,820.88
  6. Step 6: Final answer
    x = 3,197.82

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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.