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Finding the Fourth Proportional to 850.87, 1,278.21 and 504.37

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Solution

The fourth proportional to 850.87, 1,278.21 and 504.37 is: 757.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.87 : 1,278.21 = 504.37 : x
  2. Step 2: Convert to fraction form
    850.87/1,278.21 = 504.37/x
  3. Step 3: Cross multiply
    850.87x = 1,278.21 × 504.37
  4. Step 4: Simplify right side
    850.87x = 644,690.78
  5. Step 5: Solve for x
    x = 644,690.78/850.87
  6. Step 6: Final answer
    x = 757.68

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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.