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Finding the Fourth Proportional to 3,991.92, 5,987.87 and 1,070.14

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Solution

The fourth proportional to 3,991.92, 5,987.87 and 1,070.14 is: 1,605.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.92 : 5,987.87 = 1,070.14 : x
  2. Step 2: Convert to fraction form
    3,991.92/5,987.87 = 1,070.14/x
  3. Step 3: Cross multiply
    3,991.92x = 5,987.87 × 1,070.14
  4. Step 4: Simplify right side
    3,991.92x = 6,407,859.20
  5. Step 5: Solve for x
    x = 6,407,859.20/3,991.92
  6. Step 6: Final answer
    x = 1,605.21

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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.