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Finding the Fourth Proportional to 412,879.10, 619,319.60 and 113,363.78

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Solution

The fourth proportional to 412,879.10, 619,319.60 and 113,363.78 is: 170,045.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,879.10 : 619,319.60 = 113,363.78 : x
  2. Step 2: Convert to fraction form
    412,879.10/619,319.60 = 113,363.78/x
  3. Step 3: Cross multiply
    412,879.10x = 619,319.60 × 113,363.78
  4. Step 4: Simplify right side
    412,879.10x = 70,208,410,884.09
  5. Step 5: Solve for x
    x = 70,208,410,884.09/412,879.10
  6. Step 6: Final answer
    x = 170,045.93

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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.