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Finding the Fourth Proportional to 517.02, 774.96 and 343.68

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Solution

The fourth proportional to 517.02, 774.96 and 343.68 is: 515.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.02 : 774.96 = 343.68 : x
  2. Step 2: Convert to fraction form
    517.02/774.96 = 343.68/x
  3. Step 3: Cross multiply
    517.02x = 774.96 × 343.68
  4. Step 4: Simplify right side
    517.02x = 266,338.25
  5. Step 5: Solve for x
    x = 266,338.25/517.02
  6. Step 6: Final answer
    x = 515.14

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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.