Home / 2,820.32-3,891.68-1,641.56

Finding the Fourth Proportional to 2,820.32, 3,891.68 and 1,641.56

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Solution

The fourth proportional to 2,820.32, 3,891.68 and 1,641.56 is: 2,265.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.32 : 3,891.68 = 1,641.56 : x
  2. Step 2: Convert to fraction form
    2,820.32/3,891.68 = 1,641.56/x
  3. Step 3: Cross multiply
    2,820.32x = 3,891.68 × 1,641.56
  4. Step 4: Simplify right side
    2,820.32x = 6,388,426.22
  5. Step 5: Solve for x
    x = 6,388,426.22/2,820.32
  6. Step 6: Final answer
    x = 2,265.14

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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.