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Finding the Fourth Proportional to 1,722.52, 2,581.26 and 855.64

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Solution

The fourth proportional to 1,722.52, 2,581.26 and 855.64 is: 1,282.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,722.52 : 2,581.26 = 855.64 : x
  2. Step 2: Convert to fraction form
    1,722.52/2,581.26 = 855.64/x
  3. Step 3: Cross multiply
    1,722.52x = 2,581.26 × 855.64
  4. Step 4: Simplify right side
    1,722.52x = 2,208,629.31
  5. Step 5: Solve for x
    x = 2,208,629.31/1,722.52
  6. Step 6: Final answer
    x = 1,282.21

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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.