Home / 2,639.12-3,641.38-1,755.40

Finding the Fourth Proportional to 2,639.12, 3,641.38 and 1,755.40

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Solution

The fourth proportional to 2,639.12, 3,641.38 and 1,755.40 is: 2,422.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.12 : 3,641.38 = 1,755.40 : x
  2. Step 2: Convert to fraction form
    2,639.12/3,641.38 = 1,755.40/x
  3. Step 3: Cross multiply
    2,639.12x = 3,641.38 × 1,755.40
  4. Step 4: Simplify right side
    2,639.12x = 6,392,078.45
  5. Step 5: Solve for x
    x = 6,392,078.45/2,639.12
  6. Step 6: Final answer
    x = 2,422.05

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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.