Home / 2,812.28-3,880.88-1,553.31

Finding the Fourth Proportional to 2,812.28, 3,880.88 and 1,553.31

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Solution

The fourth proportional to 2,812.28, 3,880.88 and 1,553.31 is: 2,143.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.28 : 3,880.88 = 1,553.31 : x
  2. Step 2: Convert to fraction form
    2,812.28/3,880.88 = 1,553.31/x
  3. Step 3: Cross multiply
    2,812.28x = 3,880.88 × 1,553.31
  4. Step 4: Simplify right side
    2,812.28x = 6,028,201.95
  5. Step 5: Solve for x
    x = 6,028,201.95/2,812.28
  6. Step 6: Final answer
    x = 2,143.53

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1.5x scale

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.