Home / 3,851.90-5,313.21-2,278.88

Finding the Fourth Proportional to 3,851.90, 5,313.21 and 2,278.88

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Solution

The fourth proportional to 3,851.90, 5,313.21 and 2,278.88 is: 3,143.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,851.90 : 5,313.21 = 2,278.88 : x
  2. Step 2: Convert to fraction form
    3,851.90/5,313.21 = 2,278.88/x
  3. Step 3: Cross multiply
    3,851.90x = 5,313.21 × 2,278.88
  4. Step 4: Simplify right side
    3,851.90x = 12,108,168.00
  5. Step 5: Solve for x
    x = 12,108,168.00/3,851.90
  6. Step 6: Final answer
    x = 3,143.43

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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.