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Finding the Fourth Proportional to 399,638.80, 599,458.20 and 104,150.80

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Solution

The fourth proportional to 399,638.80, 599,458.20 and 104,150.80 is: 156,226.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,638.80 : 599,458.20 = 104,150.80 : x
  2. Step 2: Convert to fraction form
    399,638.80/599,458.20 = 104,150.80/x
  3. Step 3: Cross multiply
    399,638.80x = 599,458.20 × 104,150.80
  4. Step 4: Simplify right side
    399,638.80x = 62,434,051,096.56
  5. Step 5: Solve for x
    x = 62,434,051,096.56/399,638.80
  6. Step 6: Final answer
    x = 156,226.20

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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.