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Finding the Fourth Proportional to 400,039.20, 600,145.20 and 119,584.80

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Solution

The fourth proportional to 400,039.20, 600,145.20 and 119,584.80 is: 179,403.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,039.20 : 600,145.20 = 119,584.80 : x
  2. Step 2: Convert to fraction form
    400,039.20/600,145.20 = 119,584.80/x
  3. Step 3: Cross multiply
    400,039.20x = 600,145.20 × 119,584.80
  4. Step 4: Simplify right side
    400,039.20x = 71,768,243,712.96
  5. Step 5: Solve for x
    x = 71,768,243,712.96/400,039.20
  6. Step 6: Final answer
    x = 179,403.03

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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.