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Finding the Fourth Proportional to 370,879.57, 511,879.34 and 217,917.73

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Solution

The fourth proportional to 370,879.57, 511,879.34 and 217,917.73 is: 300,764.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,879.57 : 511,879.34 = 217,917.73 : x
  2. Step 2: Convert to fraction form
    370,879.57/511,879.34 = 217,917.73/x
  3. Step 3: Cross multiply
    370,879.57x = 511,879.34 × 217,917.73
  4. Step 4: Simplify right side
    370,879.57x = 111,547,583,806.70
  5. Step 5: Solve for x
    x = 111,547,583,806.70/370,879.57
  6. Step 6: Final answer
    x = 300,764.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.