Home / 2,820.40-3,892.37-1,641.38

Finding the Fourth Proportional to 2,820.40, 3,892.37 and 1,641.38

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Solution

The fourth proportional to 2,820.40, 3,892.37 and 1,641.38 is: 2,265.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.40 : 3,892.37 = 1,641.38 : x
  2. Step 2: Convert to fraction form
    2,820.40/3,892.37 = 1,641.38/x
  3. Step 3: Cross multiply
    2,820.40x = 3,892.37 × 1,641.38
  4. Step 4: Simplify right side
    2,820.40x = 6,388,830.60
  5. Step 5: Solve for x
    x = 6,388,830.60/2,820.40
  6. Step 6: Final answer
    x = 2,265.22

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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.