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Finding the Fourth Proportional to 514.70, 771.87 and 149.39

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Solution

The fourth proportional to 514.70, 771.87 and 149.39 is: 224.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.70 : 771.87 = 149.39 : x
  2. Step 2: Convert to fraction form
    514.70/771.87 = 149.39/x
  3. Step 3: Cross multiply
    514.70x = 771.87 × 149.39
  4. Step 4: Simplify right side
    514.70x = 115,309.66
  5. Step 5: Solve for x
    x = 115,309.66/514.70
  6. Step 6: Final answer
    x = 224.03

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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.