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Finding the Fourth Proportional to 322,790.88, 445,456.32 and 195,478.56

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Solution

The fourth proportional to 322,790.88, 445,456.32 and 195,478.56 is: 269,763.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,790.88 : 445,456.32 = 195,478.56 : x
  2. Step 2: Convert to fraction form
    322,790.88/445,456.32 = 195,478.56/x
  3. Step 3: Cross multiply
    322,790.88x = 445,456.32 × 195,478.56
  4. Step 4: Simplify right side
    322,790.88x = 87,077,159,976.50
  5. Step 5: Solve for x
    x = 87,077,159,976.50/322,790.88
  6. Step 6: Final answer
    x = 269,763.38

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1.5x scale

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.