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Finding the Fourth Proportional to 400,199.96, 600,722.82 and 391,164.44

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Solution

The fourth proportional to 400,199.96, 600,722.82 and 391,164.44 is: 587,159.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,199.96 : 600,722.82 = 391,164.44 : x
  2. Step 2: Convert to fraction form
    400,199.96/600,722.82 = 391,164.44/x
  3. Step 3: Cross multiply
    400,199.96x = 600,722.82 × 391,164.44
  4. Step 4: Simplify right side
    400,199.96x = 234,981,405,480.52
  5. Step 5: Solve for x
    x = 234,981,405,480.52/400,199.96
  6. Step 6: Final answer
    x = 587,159.99

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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.