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Finding the Fourth Proportional to 409.65, 613.41 and 226.66

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Solution

The fourth proportional to 409.65, 613.41 and 226.66 is: 339.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.65 : 613.41 = 226.66 : x
  2. Step 2: Convert to fraction form
    409.65/613.41 = 226.66/x
  3. Step 3: Cross multiply
    409.65x = 613.41 × 226.66
  4. Step 4: Simplify right side
    409.65x = 139,035.51
  5. Step 5: Solve for x
    x = 139,035.51/409.65
  6. Step 6: Final answer
    x = 339.40

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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.