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Finding the Fourth Proportional to 519.01, 776.92 and 445.20

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Solution

The fourth proportional to 519.01, 776.92 and 445.20 is: 666.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.01 : 776.92 = 445.20 : x
  2. Step 2: Convert to fraction form
    519.01/776.92 = 445.20/x
  3. Step 3: Cross multiply
    519.01x = 776.92 × 445.20
  4. Step 4: Simplify right side
    519.01x = 345,880.34
  5. Step 5: Solve for x
    x = 345,880.34/519.01
  6. Step 6: Final answer
    x = 666.43

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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.