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Finding the Fourth Proportional to 3,859.38, 5,789.07 and 1,086.30

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Solution

The fourth proportional to 3,859.38, 5,789.07 and 1,086.30 is: 1,629.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,859.38 : 5,789.07 = 1,086.30 : x
  2. Step 2: Convert to fraction form
    3,859.38/5,789.07 = 1,086.30/x
  3. Step 3: Cross multiply
    3,859.38x = 5,789.07 × 1,086.30
  4. Step 4: Simplify right side
    3,859.38x = 6,288,666.74
  5. Step 5: Solve for x
    x = 6,288,666.74/3,859.38
  6. Step 6: Final answer
    x = 1,629.45

Related Problems

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Half scale
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Double scale
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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.