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Finding the Fourth Proportional to 519.87, 779.72 and 173.45

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Solution

The fourth proportional to 519.87, 779.72 and 173.45 is: 260.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.87 : 779.72 = 173.45 : x
  2. Step 2: Convert to fraction form
    519.87/779.72 = 173.45/x
  3. Step 3: Cross multiply
    519.87x = 779.72 × 173.45
  4. Step 4: Simplify right side
    519.87x = 135,238.97
  5. Step 5: Solve for x
    x = 135,238.97/519.87
  6. Step 6: Final answer
    x = 260.14

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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.