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Finding the Fourth Proportional to 519.20, 777.88 and 441.44

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Solution

The fourth proportional to 519.20, 777.88 and 441.44 is: 661.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.20 : 777.88 = 441.44 : x
  2. Step 2: Convert to fraction form
    519.20/777.88 = 441.44/x
  3. Step 3: Cross multiply
    519.20x = 777.88 × 441.44
  4. Step 4: Simplify right side
    519.20x = 343,387.35
  5. Step 5: Solve for x
    x = 343,387.35/519.20
  6. Step 6: Final answer
    x = 661.38

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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.