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Finding the Fourth Proportional to 3,908.97, 5,395.07 and 3,779.22

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Solution

The fourth proportional to 3,908.97, 5,395.07 and 3,779.22 is: 5,215.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,908.97 : 5,395.07 = 3,779.22 : x
  2. Step 2: Convert to fraction form
    3,908.97/5,395.07 = 3,779.22/x
  3. Step 3: Cross multiply
    3,908.97x = 5,395.07 × 3,779.22
  4. Step 4: Simplify right side
    3,908.97x = 20,389,137.55
  5. Step 5: Solve for x
    x = 20,389,137.55/3,908.97
  6. Step 6: Final answer
    x = 5,215.99

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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.