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Finding the Fourth Proportional to 3,859.84, 5,789.71 and 1,086.51

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Solution

The fourth proportional to 3,859.84, 5,789.71 and 1,086.51 is: 1,629.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,859.84 : 5,789.71 = 1,086.51 : x
  2. Step 2: Convert to fraction form
    3,859.84/5,789.71 = 1,086.51/x
  3. Step 3: Cross multiply
    3,859.84x = 5,789.71 × 1,086.51
  4. Step 4: Simplify right side
    3,859.84x = 6,290,563.34
  5. Step 5: Solve for x
    x = 6,290,563.34/3,859.84
  6. Step 6: Final answer
    x = 1,629.75

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Similar ratio
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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.