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Finding the Fourth Proportional to 479,489.22, 661,321.26 and 307,423.62

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Solution

The fourth proportional to 479,489.22, 661,321.26 and 307,423.62 is: 424,004.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,489.22 : 661,321.26 = 307,423.62 : x
  2. Step 2: Convert to fraction form
    479,489.22/661,321.26 = 307,423.62/x
  3. Step 3: Cross multiply
    479,489.22x = 661,321.26 × 307,423.62
  4. Step 4: Simplify right side
    479,489.22x = 203,305,775,732.16
  5. Step 5: Solve for x
    x = 203,305,775,732.16/479,489.22
  6. Step 6: Final answer
    x = 424,004.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.