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Finding the Fourth Proportional to 2,104.76, 3,157.28 and 872.22

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Solution

The fourth proportional to 2,104.76, 3,157.28 and 872.22 is: 1,308.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,104.76 : 3,157.28 = 872.22 : x
  2. Step 2: Convert to fraction form
    2,104.76/3,157.28 = 872.22/x
  3. Step 3: Cross multiply
    2,104.76x = 3,157.28 × 872.22
  4. Step 4: Simplify right side
    2,104.76x = 2,753,842.76
  5. Step 5: Solve for x
    x = 2,753,842.76/2,104.76
  6. Step 6: Final answer
    x = 1,308.39

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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.