Home / 2,689.13-3,711.60-1,641.80

Finding the Fourth Proportional to 2,689.13, 3,711.60 and 1,641.80

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Solution

The fourth proportional to 2,689.13, 3,711.60 and 1,641.80 is: 2,266.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,689.13 : 3,711.60 = 1,641.80 : x
  2. Step 2: Convert to fraction form
    2,689.13/3,711.60 = 1,641.80/x
  3. Step 3: Cross multiply
    2,689.13x = 3,711.60 × 1,641.80
  4. Step 4: Simplify right side
    2,689.13x = 6,093,686.32
  5. Step 5: Solve for x
    x = 6,093,686.32/2,689.13
  6. Step 6: Final answer
    x = 2,266.05

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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.