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Finding the Fourth Proportional to 429,998.56, 644,999.26 and 130,481.62

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Solution

The fourth proportional to 429,998.56, 644,999.26 and 130,481.62 is: 195,722.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,998.56 : 644,999.26 = 130,481.62 : x
  2. Step 2: Convert to fraction form
    429,998.56/644,999.26 = 130,481.62/x
  3. Step 3: Cross multiply
    429,998.56x = 644,999.26 × 130,481.62
  4. Step 4: Simplify right side
    429,998.56x = 84,160,548,343.60
  5. Step 5: Solve for x
    x = 84,160,548,343.60/429,998.56
  6. Step 6: Final answer
    x = 195,722.86

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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.