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Finding the Fourth Proportional to 519.20, 778.82 and 154

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Solution

The fourth proportional to 519.20, 778.82 and 154 is: 231.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.20 : 778.82 = 154 : x
  2. Step 2: Convert to fraction form
    519.20/778.82 = 154/x
  3. Step 3: Cross multiply
    519.20x = 778.82 × 154
  4. Step 4: Simplify right side
    519.20x = 119,938.28
  5. Step 5: Solve for x
    x = 119,938.28/519.20
  6. Step 6: Final answer
    x = 231.01

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.