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Finding the Fourth Proportional to 513.30, 768.12 and 411.24

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Solution

The fourth proportional to 513.30, 768.12 and 411.24 is: 615.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.30 : 768.12 = 411.24 : x
  2. Step 2: Convert to fraction form
    513.30/768.12 = 411.24/x
  3. Step 3: Cross multiply
    513.30x = 768.12 × 411.24
  4. Step 4: Simplify right side
    513.30x = 315,881.67
  5. Step 5: Solve for x
    x = 315,881.67/513.30
  6. Step 6: Final answer
    x = 615.39

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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.