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Finding the Fourth Proportional to 275,716.62, 411,707.22 and 218,919.42

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Solution

The fourth proportional to 275,716.62, 411,707.22 and 218,919.42 is: 326,896.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,716.62 : 411,707.22 = 218,919.42 : x
  2. Step 2: Convert to fraction form
    275,716.62/411,707.22 = 218,919.42/x
  3. Step 3: Cross multiply
    275,716.62x = 411,707.22 × 218,919.42
  4. Step 4: Simplify right side
    275,716.62x = 90,130,705,812.21
  5. Step 5: Solve for x
    x = 90,130,705,812.21/275,716.62
  6. Step 6: Final answer
    x = 326,896.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.