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Finding the Fourth Proportional to 519.96, 717.50 and 320.73

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Solution

The fourth proportional to 519.96, 717.50 and 320.73 is: 442.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.96 : 717.50 = 320.73 : x
  2. Step 2: Convert to fraction form
    519.96/717.50 = 320.73/x
  3. Step 3: Cross multiply
    519.96x = 717.50 × 320.73
  4. Step 4: Simplify right side
    519.96x = 230,122.17
  5. Step 5: Solve for x
    x = 230,122.17/519.96
  6. Step 6: Final answer
    x = 442.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.