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Finding the Fourth Proportional to 516.49, 774.55 and 208.24

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Solution

The fourth proportional to 516.49, 774.55 and 208.24 is: 312.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.49 : 774.55 = 208.24 : x
  2. Step 2: Convert to fraction form
    516.49/774.55 = 208.24/x
  3. Step 3: Cross multiply
    516.49x = 774.55 × 208.24
  4. Step 4: Simplify right side
    516.49x = 161,292.29
  5. Step 5: Solve for x
    x = 161,292.29/516.49
  6. Step 6: Final answer
    x = 312.29

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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.