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Finding the Fourth Proportional to 409.77, 613.89 and 344.79

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Solution

The fourth proportional to 409.77, 613.89 and 344.79 is: 516.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.77 : 613.89 = 344.79 : x
  2. Step 2: Convert to fraction form
    409.77/613.89 = 344.79/x
  3. Step 3: Cross multiply
    409.77x = 613.89 × 344.79
  4. Step 4: Simplify right side
    409.77x = 211,663.13
  5. Step 5: Solve for x
    x = 211,663.13/409.77
  6. Step 6: Final answer
    x = 516.54

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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.