Home / 2,820.19-3,892.82-1,642.25

Finding the Fourth Proportional to 2,820.19, 3,892.82 and 1,642.25

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Solution

The fourth proportional to 2,820.19, 3,892.82 and 1,642.25 is: 2,266.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.19 : 3,892.82 = 1,642.25 : x
  2. Step 2: Convert to fraction form
    2,820.19/3,892.82 = 1,642.25/x
  3. Step 3: Cross multiply
    2,820.19x = 3,892.82 × 1,642.25
  4. Step 4: Simplify right side
    2,820.19x = 6,392,983.65
  5. Step 5: Solve for x
    x = 6,392,983.65/2,820.19
  6. Step 6: Final answer
    x = 2,266.86

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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.