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Finding the Fourth Proportional to 3,908.97, 5,395.14 and 2,315.97

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Solution

The fourth proportional to 3,908.97, 5,395.14 and 2,315.97 is: 3,196.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,908.97 : 5,395.14 = 2,315.97 : x
  2. Step 2: Convert to fraction form
    3,908.97/5,395.14 = 2,315.97/x
  3. Step 3: Cross multiply
    3,908.97x = 5,395.14 × 2,315.97
  4. Step 4: Simplify right side
    3,908.97x = 12,494,982.39
  5. Step 5: Solve for x
    x = 12,494,982.39/3,908.97
  6. Step 6: Final answer
    x = 3,196.49

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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.