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Finding the Fourth Proportional to 3,889.68, 5,367.84 and 2,398.32

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Solution

The fourth proportional to 3,889.68, 5,367.84 and 2,398.32 is: 3,309.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.68 : 5,367.84 = 2,398.32 : x
  2. Step 2: Convert to fraction form
    3,889.68/5,367.84 = 2,398.32/x
  3. Step 3: Cross multiply
    3,889.68x = 5,367.84 × 2,398.32
  4. Step 4: Simplify right side
    3,889.68x = 12,873,798.03
  5. Step 5: Solve for x
    x = 12,873,798.03/3,889.68
  6. Step 6: Final answer
    x = 3,309.73

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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.