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Finding the Fourth Proportional to 3,987.99, 5,982.30 and 1,066.23

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Solution

The fourth proportional to 3,987.99, 5,982.30 and 1,066.23 is: 1,599.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.99 : 5,982.30 = 1,066.23 : x
  2. Step 2: Convert to fraction form
    3,987.99/5,982.30 = 1,066.23/x
  3. Step 3: Cross multiply
    3,987.99x = 5,982.30 × 1,066.23
  4. Step 4: Simplify right side
    3,987.99x = 6,378,507.73
  5. Step 5: Solve for x
    x = 6,378,507.73/3,987.99
  6. Step 6: Final answer
    x = 1,599.43

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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.