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Finding the Fourth Proportional to 515.21, 772.82 and 226.63

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Solution

The fourth proportional to 515.21, 772.82 and 226.63 is: 339.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.21 : 772.82 = 226.63 : x
  2. Step 2: Convert to fraction form
    515.21/772.82 = 226.63/x
  3. Step 3: Cross multiply
    515.21x = 772.82 × 226.63
  4. Step 4: Simplify right side
    515.21x = 175,139.20
  5. Step 5: Solve for x
    x = 175,139.20/515.21
  6. Step 6: Final answer
    x = 339.94

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Similar ratio
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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.