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Finding the Fourth Proportional to 518.19, 777.16 and 171.44

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Solution

The fourth proportional to 518.19, 777.16 and 171.44 is: 257.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.19 : 777.16 = 171.44 : x
  2. Step 2: Convert to fraction form
    518.19/777.16 = 171.44/x
  3. Step 3: Cross multiply
    518.19x = 777.16 × 171.44
  4. Step 4: Simplify right side
    518.19x = 133,232.85
  5. Step 5: Solve for x
    x = 133,232.85/518.19
  6. Step 6: Final answer
    x = 257.11

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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.