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Finding the Fourth Proportional to 398,608.22, 597,909.80 and 145,906.31

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Solution

The fourth proportional to 398,608.22, 597,909.80 and 145,906.31 is: 218,858.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,608.22 : 597,909.80 = 145,906.31 : x
  2. Step 2: Convert to fraction form
    398,608.22/597,909.80 = 145,906.31/x
  3. Step 3: Cross multiply
    398,608.22x = 597,909.80 × 145,906.31
  4. Step 4: Simplify right side
    398,608.22x = 87,238,814,490.38
  5. Step 5: Solve for x
    x = 87,238,814,490.38/398,608.22
  6. Step 6: Final answer
    x = 218,858.54

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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.