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Finding the Fourth Proportional to 518.99, 778.44 and 189.93

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Solution

The fourth proportional to 518.99, 778.44 and 189.93 is: 284.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.99 : 778.44 = 189.93 : x
  2. Step 2: Convert to fraction form
    518.99/778.44 = 189.93/x
  3. Step 3: Cross multiply
    518.99x = 778.44 × 189.93
  4. Step 4: Simplify right side
    518.99x = 147,849.11
  5. Step 5: Solve for x
    x = 147,849.11/518.99
  6. Step 6: Final answer
    x = 284.88

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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.