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Finding the Fourth Proportional to 517.20, 774.17 and 273.40

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Solution

The fourth proportional to 517.20, 774.17 and 273.40 is: 409.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.20 : 774.17 = 273.40 : x
  2. Step 2: Convert to fraction form
    517.20/774.17 = 273.40/x
  3. Step 3: Cross multiply
    517.20x = 774.17 × 273.40
  4. Step 4: Simplify right side
    517.20x = 211,658.08
  5. Step 5: Solve for x
    x = 211,658.08/517.20
  6. Step 6: Final answer
    x = 409.24

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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.