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Finding the Fourth Proportional to 800,817.66, 1,105,128.42 and 438,241.56

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Solution

The fourth proportional to 800,817.66, 1,105,128.42 and 438,241.56 is: 604,773.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    800,817.66 : 1,105,128.42 = 438,241.56 : x
  2. Step 2: Convert to fraction form
    800,817.66/1,105,128.42 = 438,241.56/x
  3. Step 3: Cross multiply
    800,817.66x = 1,105,128.42 × 438,241.56
  4. Step 4: Simplify right side
    800,817.66x = 484,313,202,781.14
  5. Step 5: Solve for x
    x = 484,313,202,781.14/800,817.66
  6. Step 6: Final answer
    x = 604,773.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.