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Finding the Fourth Proportional to 3,114.78, 4,672.11 and 806.22

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Solution

The fourth proportional to 3,114.78, 4,672.11 and 806.22 is: 1,209.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,114.78 : 4,672.11 = 806.22 : x
  2. Step 2: Convert to fraction form
    3,114.78/4,672.11 = 806.22/x
  3. Step 3: Cross multiply
    3,114.78x = 4,672.11 × 806.22
  4. Step 4: Simplify right side
    3,114.78x = 3,766,748.52
  5. Step 5: Solve for x
    x = 3,766,748.52/3,114.78
  6. Step 6: Final answer
    x = 1,209.31

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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.