Home / 2,082.20-3,116.10-1,909.40

Finding the Fourth Proportional to 2,082.20, 3,116.10 and 1,909.40

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Solution

The fourth proportional to 2,082.20, 3,116.10 and 1,909.40 is: 2,857.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,082.20 : 3,116.10 = 1,909.40 : x
  2. Step 2: Convert to fraction form
    2,082.20/3,116.10 = 1,909.40/x
  3. Step 3: Cross multiply
    2,082.20x = 3,116.10 × 1,909.40
  4. Step 4: Simplify right side
    2,082.20x = 5,949,881.34
  5. Step 5: Solve for x
    x = 5,949,881.34/2,082.20
  6. Step 6: Final answer
    x = 2,857.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.