Home / 2,820.13-3,892.19-1,641.85

Finding the Fourth Proportional to 2,820.13, 3,892.19 and 1,641.85

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Solution

The fourth proportional to 2,820.13, 3,892.19 and 1,641.85 is: 2,265.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.13 : 3,892.19 = 1,641.85 : x
  2. Step 2: Convert to fraction form
    2,820.13/3,892.19 = 1,641.85/x
  3. Step 3: Cross multiply
    2,820.13x = 3,892.19 × 1,641.85
  4. Step 4: Simplify right side
    2,820.13x = 6,390,374.21
  5. Step 5: Solve for x
    x = 6,390,374.21/2,820.13
  6. Step 6: Final answer
    x = 2,265.99

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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.