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Finding the Fourth Proportional to 2,091.02, 3,136.52 and 857.56

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Solution

The fourth proportional to 2,091.02, 3,136.52 and 857.56 is: 1,286.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,091.02 : 3,136.52 = 857.56 : x
  2. Step 2: Convert to fraction form
    2,091.02/3,136.52 = 857.56/x
  3. Step 3: Cross multiply
    2,091.02x = 3,136.52 × 857.56
  4. Step 4: Simplify right side
    2,091.02x = 2,689,763.10
  5. Step 5: Solve for x
    x = 2,689,763.10/2,091.02
  6. Step 6: Final answer
    x = 1,286.34

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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.