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Finding the Fourth Proportional to 445,491.54, 667,735.31 and 221,012.87

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Solution

The fourth proportional to 445,491.54, 667,735.31 and 221,012.87 is: 331,270.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,491.54 : 667,735.31 = 221,012.87 : x
  2. Step 2: Convert to fraction form
    445,491.54/667,735.31 = 221,012.87/x
  3. Step 3: Cross multiply
    445,491.54x = 667,735.31 × 221,012.87
  4. Step 4: Simplify right side
    445,491.54x = 147,578,094,477.30
  5. Step 5: Solve for x
    x = 147,578,094,477.30/445,491.54
  6. Step 6: Final answer
    x = 331,270.25

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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.