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Finding the Fourth Proportional to 517.35, 776.01 and 209.19

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Solution

The fourth proportional to 517.35, 776.01 and 209.19 is: 313.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.35 : 776.01 = 209.19 : x
  2. Step 2: Convert to fraction form
    517.35/776.01 = 209.19/x
  3. Step 3: Cross multiply
    517.35x = 776.01 × 209.19
  4. Step 4: Simplify right side
    517.35x = 162,336.05
  5. Step 5: Solve for x
    x = 162,336.05/517.35
  6. Step 6: Final answer
    x = 313.79

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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.