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Finding the Fourth Proportional to 517.32, 774.45 and 396.99

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Solution

The fourth proportional to 517.32, 774.45 and 396.99 is: 594.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.32 : 774.45 = 396.99 : x
  2. Step 2: Convert to fraction form
    517.32/774.45 = 396.99/x
  3. Step 3: Cross multiply
    517.32x = 774.45 × 396.99
  4. Step 4: Simplify right side
    517.32x = 307,448.91
  5. Step 5: Solve for x
    x = 307,448.91/517.32
  6. Step 6: Final answer
    x = 594.31

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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.