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Finding the Fourth Proportional to 519.82, 779.81 and 173.09

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Solution

The fourth proportional to 519.82, 779.81 and 173.09 is: 259.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.82 : 779.81 = 173.09 : x
  2. Step 2: Convert to fraction form
    519.82/779.81 = 173.09/x
  3. Step 3: Cross multiply
    519.82x = 779.81 × 173.09
  4. Step 4: Simplify right side
    519.82x = 134,977.31
  5. Step 5: Solve for x
    x = 134,977.31/519.82
  6. Step 6: Final answer
    x = 259.66

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Double scale
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Similar ratio
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1.5x scale

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.