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Finding the Fourth Proportional to 423,840.60, 635,365.62 and 143,161.56

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Solution

The fourth proportional to 423,840.60, 635,365.62 and 143,161.56 is: 214,608.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,840.60 : 635,365.62 = 143,161.56 : x
  2. Step 2: Convert to fraction form
    423,840.60/635,365.62 = 143,161.56/x
  3. Step 3: Cross multiply
    423,840.60x = 635,365.62 × 143,161.56
  4. Step 4: Simplify right side
    423,840.60x = 90,959,933,329.57
  5. Step 5: Solve for x
    x = 90,959,933,329.57/423,840.60
  6. Step 6: Final answer
    x = 214,608.83

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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.