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Finding the Fourth Proportional to 519.86, 779.25 and 324.56

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Solution

The fourth proportional to 519.86, 779.25 and 324.56 is: 486.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.86 : 779.25 = 324.56 : x
  2. Step 2: Convert to fraction form
    519.86/779.25 = 324.56/x
  3. Step 3: Cross multiply
    519.86x = 779.25 × 324.56
  4. Step 4: Simplify right side
    519.86x = 252,913.38
  5. Step 5: Solve for x
    x = 252,913.38/519.86
  6. Step 6: Final answer
    x = 486.50

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Similar ratio
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1.5x scale

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.