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Finding the Fourth Proportional to 3,908.79, 5,393.28 and 2,229.56

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Solution

The fourth proportional to 3,908.79, 5,393.28 and 2,229.56 is: 3,076.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,908.79 : 5,393.28 = 2,229.56 : x
  2. Step 2: Convert to fraction form
    3,908.79/5,393.28 = 2,229.56/x
  3. Step 3: Cross multiply
    3,908.79x = 5,393.28 × 2,229.56
  4. Step 4: Simplify right side
    3,908.79x = 12,024,642.98
  5. Step 5: Solve for x
    x = 12,024,642.98/3,908.79
  6. Step 6: Final answer
    x = 3,076.31

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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.