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Finding the Fourth Proportional to 513.33, 769.99 and 411.26

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Solution

The fourth proportional to 513.33, 769.99 and 411.26 is: 616.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.33 : 769.99 = 411.26 : x
  2. Step 2: Convert to fraction form
    513.33/769.99 = 411.26/x
  3. Step 3: Cross multiply
    513.33x = 769.99 × 411.26
  4. Step 4: Simplify right side
    513.33x = 316,663.13
  5. Step 5: Solve for x
    x = 316,663.13/513.33
  6. Step 6: Final answer
    x = 616.89

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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.