Home / 2,869.10-3,959.41-1,690.85

Finding the Fourth Proportional to 2,869.10, 3,959.41 and 1,690.85

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Solution

The fourth proportional to 2,869.10, 3,959.41 and 1,690.85 is: 2,333.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,869.10 : 3,959.41 = 1,690.85 : x
  2. Step 2: Convert to fraction form
    2,869.10/3,959.41 = 1,690.85/x
  3. Step 3: Cross multiply
    2,869.10x = 3,959.41 × 1,690.85
  4. Step 4: Simplify right side
    2,869.10x = 6,694,768.40
  5. Step 5: Solve for x
    x = 6,694,768.40/2,869.10
  6. Step 6: Final answer
    x = 2,333.40

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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.