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Finding the Fourth Proportional to 409.68, 613.15 and 336.56

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Solution

The fourth proportional to 409.68, 613.15 and 336.56 is: 503.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.68 : 613.15 = 336.56 : x
  2. Step 2: Convert to fraction form
    409.68/613.15 = 336.56/x
  3. Step 3: Cross multiply
    409.68x = 613.15 × 336.56
  4. Step 4: Simplify right side
    409.68x = 206,361.76
  5. Step 5: Solve for x
    x = 206,361.76/409.68
  6. Step 6: Final answer
    x = 503.71

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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.