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Finding the Fourth Proportional to 516.24, 773.12 and 399.84

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Solution

The fourth proportional to 516.24, 773.12 and 399.84 is: 598.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.24 : 773.12 = 399.84 : x
  2. Step 2: Convert to fraction form
    516.24/773.12 = 399.84/x
  3. Step 3: Cross multiply
    516.24x = 773.12 × 399.84
  4. Step 4: Simplify right side
    516.24x = 309,124.30
  5. Step 5: Solve for x
    x = 309,124.30/516.24
  6. Step 6: Final answer
    x = 598.80

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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.