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Finding the Fourth Proportional to 611.94, 843.55 and 480.72

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Solution

The fourth proportional to 611.94, 843.55 and 480.72 is: 662.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.94 : 843.55 = 480.72 : x
  2. Step 2: Convert to fraction form
    611.94/843.55 = 480.72/x
  3. Step 3: Cross multiply
    611.94x = 843.55 × 480.72
  4. Step 4: Simplify right side
    611.94x = 405,508.95
  5. Step 5: Solve for x
    x = 405,508.95/611.94
  6. Step 6: Final answer
    x = 662.66

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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.