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Finding the Fourth Proportional to 2,851.72, 4,274.34 and 2,786.92

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Solution

The fourth proportional to 2,851.72, 4,274.34 and 2,786.92 is: 4,177.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,851.72 : 4,274.34 = 2,786.92 : x
  2. Step 2: Convert to fraction form
    2,851.72/4,274.34 = 2,786.92/x
  3. Step 3: Cross multiply
    2,851.72x = 4,274.34 × 2,786.92
  4. Step 4: Simplify right side
    2,851.72x = 11,912,243.63
  5. Step 5: Solve for x
    x = 11,912,243.63/2,851.72
  6. Step 6: Final answer
    x = 4,177.21

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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.