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Finding the Fourth Proportional to 2,782.55, 4,173.86 and 834.64

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Solution

The fourth proportional to 2,782.55, 4,173.86 and 834.64 is: 1,251.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,782.55 : 4,173.86 = 834.64 : x
  2. Step 2: Convert to fraction form
    2,782.55/4,173.86 = 834.64/x
  3. Step 3: Cross multiply
    2,782.55x = 4,173.86 × 834.64
  4. Step 4: Simplify right side
    2,782.55x = 3,483,662.16
  5. Step 5: Solve for x
    x = 3,483,662.16/2,782.55
  6. Step 6: Final answer
    x = 1,251.97

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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.