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Finding the Fourth Proportional to 519.25, 777.86 and 345.41

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Solution

The fourth proportional to 519.25, 777.86 and 345.41 is: 517.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.25 : 777.86 = 345.41 : x
  2. Step 2: Convert to fraction form
    519.25/777.86 = 345.41/x
  3. Step 3: Cross multiply
    519.25x = 777.86 × 345.41
  4. Step 4: Simplify right side
    519.25x = 268,680.62
  5. Step 5: Solve for x
    x = 268,680.62/519.25
  6. Step 6: Final answer
    x = 517.44

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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.