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Finding the Fourth Proportional to 3,986.19, 5,979.29 and 2,880.27

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Solution

The fourth proportional to 3,986.19, 5,979.29 and 2,880.27 is: 4,320.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986.19 : 5,979.29 = 2,880.27 : x
  2. Step 2: Convert to fraction form
    3,986.19/5,979.29 = 2,880.27/x
  3. Step 3: Cross multiply
    3,986.19x = 5,979.29 × 2,880.27
  4. Step 4: Simplify right side
    3,986.19x = 17,221,955.21
  5. Step 5: Solve for x
    x = 17,221,955.21/3,986.19
  6. Step 6: Final answer
    x = 4,320.41

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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.