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Finding the Fourth Proportional to 519.20, 778.91 and 299.96

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Solution

The fourth proportional to 519.20, 778.91 and 299.96 is: 450.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.20 : 778.91 = 299.96 : x
  2. Step 2: Convert to fraction form
    519.20/778.91 = 299.96/x
  3. Step 3: Cross multiply
    519.20x = 778.91 × 299.96
  4. Step 4: Simplify right side
    519.20x = 233,642.29
  5. Step 5: Solve for x
    x = 233,642.29/519.20
  6. Step 6: Final answer
    x = 450.01

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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.