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Finding the Fourth Proportional to 2,847.64, 4,270.20 and 872.68

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Solution

The fourth proportional to 2,847.64, 4,270.20 and 872.68 is: 1,308.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,847.64 : 4,270.20 = 872.68 : x
  2. Step 2: Convert to fraction form
    2,847.64/4,270.20 = 872.68/x
  3. Step 3: Cross multiply
    2,847.64x = 4,270.20 × 872.68
  4. Step 4: Simplify right side
    2,847.64x = 3,726,518.14
  5. Step 5: Solve for x
    x = 3,726,518.14/2,847.64
  6. Step 6: Final answer
    x = 1,308.63

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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.