Home / 2,812.19-3,880.87-1,553.31

Finding the Fourth Proportional to 2,812.19, 3,880.87 and 1,553.31

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Solution

The fourth proportional to 2,812.19, 3,880.87 and 1,553.31 is: 2,143.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.19 : 3,880.87 = 1,553.31 : x
  2. Step 2: Convert to fraction form
    2,812.19/3,880.87 = 1,553.31/x
  3. Step 3: Cross multiply
    2,812.19x = 3,880.87 × 1,553.31
  4. Step 4: Simplify right side
    2,812.19x = 6,028,190.30
  5. Step 5: Solve for x
    x = 6,028,190.30/2,812.19
  6. Step 6: Final answer
    x = 2,143.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.