Home / 2,399.78-3,312.14-1,906.20

Finding the Fourth Proportional to 2,399.78, 3,312.14 and 1,906.20

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Solution

The fourth proportional to 2,399.78, 3,312.14 and 1,906.20 is: 2,630.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,399.78 : 3,312.14 = 1,906.20 : x
  2. Step 2: Convert to fraction form
    2,399.78/3,312.14 = 1,906.20/x
  3. Step 3: Cross multiply
    2,399.78x = 3,312.14 × 1,906.20
  4. Step 4: Simplify right side
    2,399.78x = 6,313,591.74
  5. Step 5: Solve for x
    x = 6,313,591.74/2,399.78
  6. Step 6: Final answer
    x = 2,630.90

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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.