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Finding the Fourth Proportional to 415,229.78, 622,623.20 and 215,053.67

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Solution

The fourth proportional to 415,229.78, 622,623.20 and 215,053.67 is: 322,465.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,229.78 : 622,623.20 = 215,053.67 : x
  2. Step 2: Convert to fraction form
    415,229.78/622,623.20 = 215,053.67/x
  3. Step 3: Cross multiply
    415,229.78x = 622,623.20 × 215,053.67
  4. Step 4: Simplify right side
    415,229.78x = 133,897,399,998.76
  5. Step 5: Solve for x
    x = 133,897,399,998.76/415,229.78
  6. Step 6: Final answer
    x = 322,465.80

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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.