Home / 2,378.11-3,281.99-1,383.45

Finding the Fourth Proportional to 2,378.11, 3,281.99 and 1,383.45

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Solution

The fourth proportional to 2,378.11, 3,281.99 and 1,383.45 is: 1,909.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,378.11 : 3,281.99 = 1,383.45 : x
  2. Step 2: Convert to fraction form
    2,378.11/3,281.99 = 1,383.45/x
  3. Step 3: Cross multiply
    2,378.11x = 3,281.99 × 1,383.45
  4. Step 4: Simplify right side
    2,378.11x = 4,540,469.07
  5. Step 5: Solve for x
    x = 4,540,469.07/2,378.11
  6. Step 6: Final answer
    x = 1,909.28

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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.