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Finding the Fourth Proportional to 855.11, 1,180.20 and 523.55

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Solution

The fourth proportional to 855.11, 1,180.20 and 523.55 is: 722.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.11 : 1,180.20 = 523.55 : x
  2. Step 2: Convert to fraction form
    855.11/1,180.20 = 523.55/x
  3. Step 3: Cross multiply
    855.11x = 1,180.20 × 523.55
  4. Step 4: Simplify right side
    855.11x = 617,893.71
  5. Step 5: Solve for x
    x = 617,893.71/855.11
  6. Step 6: Final answer
    x = 722.59

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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.