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Finding the Fourth Proportional to 3,986.69, 5,980.04 and 2,880.77

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Solution

The fourth proportional to 3,986.69, 5,980.04 and 2,880.77 is: 4,321.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986.69 : 5,980.04 = 2,880.77 : x
  2. Step 2: Convert to fraction form
    3,986.69/5,980.04 = 2,880.77/x
  3. Step 3: Cross multiply
    3,986.69x = 5,980.04 × 2,880.77
  4. Step 4: Simplify right side
    3,986.69x = 17,227,105.43
  5. Step 5: Solve for x
    x = 17,227,105.43/3,986.69
  6. Step 6: Final answer
    x = 4,321.16

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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.