Home / 3,910.20-5,865.81-1,276.79

Finding the Fourth Proportional to 3,910.20, 5,865.81 and 1,276.79

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Solution

The fourth proportional to 3,910.20, 5,865.81 and 1,276.79 is: 1,915.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,910.20 : 5,865.81 = 1,276.79 : x
  2. Step 2: Convert to fraction form
    3,910.20/5,865.81 = 1,276.79/x
  3. Step 3: Cross multiply
    3,910.20x = 5,865.81 × 1,276.79
  4. Step 4: Simplify right side
    3,910.20x = 7,489,378.22
  5. Step 5: Solve for x
    x = 7,489,378.22/3,910.20
  6. Step 6: Final answer
    x = 1,915.34

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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.