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Finding the Fourth Proportional to 518.70, 777.03 and 274.62

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Solution

The fourth proportional to 518.70, 777.03 and 274.62 is: 411.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.70 : 777.03 = 274.62 : x
  2. Step 2: Convert to fraction form
    518.70/777.03 = 274.62/x
  3. Step 3: Cross multiply
    518.70x = 777.03 × 274.62
  4. Step 4: Simplify right side
    518.70x = 213,387.98
  5. Step 5: Solve for x
    x = 213,387.98/518.70
  6. Step 6: Final answer
    x = 411.39

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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.