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Finding the Fourth Proportional to 445,532.85, 668,397.69 and 221,015.43

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Solution

The fourth proportional to 445,532.85, 668,397.69 and 221,015.43 is: 331,571.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,532.85 : 668,397.69 = 221,015.43 : x
  2. Step 2: Convert to fraction form
    445,532.85/668,397.69 = 221,015.43/x
  3. Step 3: Cross multiply
    445,532.85x = 668,397.69 × 221,015.43
  4. Step 4: Simplify right side
    445,532.85x = 147,726,202,866.36
  5. Step 5: Solve for x
    x = 147,726,202,866.36/445,532.85
  6. Step 6: Final answer
    x = 331,571.97

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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.