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Finding the Fourth Proportional to 2,771.92, 4,157.20 and 823.68

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Solution

The fourth proportional to 2,771.92, 4,157.20 and 823.68 is: 1,235.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,771.92 : 4,157.20 = 823.68 : x
  2. Step 2: Convert to fraction form
    2,771.92/4,157.20 = 823.68/x
  3. Step 3: Cross multiply
    2,771.92x = 4,157.20 × 823.68
  4. Step 4: Simplify right side
    2,771.92x = 3,424,202.50
  5. Step 5: Solve for x
    x = 3,424,202.50/2,771.92
  6. Step 6: Final answer
    x = 1,235.32

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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.