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Finding the Fourth Proportional to 389,740.89, 585,149.18 and 269,502.87

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Solution

The fourth proportional to 389,740.89, 585,149.18 and 269,502.87 is: 404,626.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,740.89 : 585,149.18 = 269,502.87 : x
  2. Step 2: Convert to fraction form
    389,740.89/585,149.18 = 269,502.87/x
  3. Step 3: Cross multiply
    389,740.89x = 585,149.18 × 269,502.87
  4. Step 4: Simplify right side
    389,740.89x = 157,699,383,388.15
  5. Step 5: Solve for x
    x = 157,699,383,388.15/389,740.89
  6. Step 6: Final answer
    x = 404,626.22

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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.