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Finding the Fourth Proportional to 855.25, 1,179.97 and 523.51

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Solution

The fourth proportional to 855.25, 1,179.97 and 523.51 is: 722.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.25 : 1,179.97 = 523.51 : x
  2. Step 2: Convert to fraction form
    855.25/1,179.97 = 523.51/x
  3. Step 3: Cross multiply
    855.25x = 1,179.97 × 523.51
  4. Step 4: Simplify right side
    855.25x = 617,726.09
  5. Step 5: Solve for x
    x = 617,726.09/855.25
  6. Step 6: Final answer
    x = 722.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.