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Finding the Fourth Proportional to 279,431.60, 419,147.40 and 101,879.60

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Solution

The fourth proportional to 279,431.60, 419,147.40 and 101,879.60 is: 152,819.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,431.60 : 419,147.40 = 101,879.60 : x
  2. Step 2: Convert to fraction form
    279,431.60/419,147.40 = 101,879.60/x
  3. Step 3: Cross multiply
    279,431.60x = 419,147.40 × 101,879.60
  4. Step 4: Simplify right side
    279,431.60x = 42,702,569,453.04
  5. Step 5: Solve for x
    x = 42,702,569,453.04/279,431.60
  6. Step 6: Final answer
    x = 152,819.40

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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.