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Finding the Fourth Proportional to 517.25, 775.98 and 228.69

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Solution

The fourth proportional to 517.25, 775.98 and 228.69 is: 343.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.25 : 775.98 = 228.69 : x
  2. Step 2: Convert to fraction form
    517.25/775.98 = 228.69/x
  3. Step 3: Cross multiply
    517.25x = 775.98 × 228.69
  4. Step 4: Simplify right side
    517.25x = 177,457.72
  5. Step 5: Solve for x
    x = 177,457.72/517.25
  6. Step 6: Final answer
    x = 343.08

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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.