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Finding the Fourth Proportional to 517.24, 775.34 and 209.08

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Solution

The fourth proportional to 517.24, 775.34 and 209.08 is: 313.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.24 : 775.34 = 209.08 : x
  2. Step 2: Convert to fraction form
    517.24/775.34 = 209.08/x
  3. Step 3: Cross multiply
    517.24x = 775.34 × 209.08
  4. Step 4: Simplify right side
    517.24x = 162,108.09
  5. Step 5: Solve for x
    x = 162,108.09/517.24
  6. Step 6: Final answer
    x = 313.41

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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.