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Finding the Fourth Proportional to 2,891.70, 4,328.24 and 2,015.28

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Solution

The fourth proportional to 2,891.70, 4,328.24 and 2,015.28 is: 3,016.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,891.70 : 4,328.24 = 2,015.28 : x
  2. Step 2: Convert to fraction form
    2,891.70/4,328.24 = 2,015.28/x
  3. Step 3: Cross multiply
    2,891.70x = 4,328.24 × 2,015.28
  4. Step 4: Simplify right side
    2,891.70x = 8,722,605.43
  5. Step 5: Solve for x
    x = 8,722,605.43/2,891.70
  6. Step 6: Final answer
    x = 3,016.43

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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.