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Finding the Fourth Proportional to 443,633.45, 665,450.18 and 219,028.55

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Solution

The fourth proportional to 443,633.45, 665,450.18 and 219,028.55 is: 328,542.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,633.45 : 665,450.18 = 219,028.55 : x
  2. Step 2: Convert to fraction form
    443,633.45/665,450.18 = 219,028.55/x
  3. Step 3: Cross multiply
    443,633.45x = 665,450.18 × 219,028.55
  4. Step 4: Simplify right side
    443,633.45x = 145,752,586,927.50
  5. Step 5: Solve for x
    x = 145,752,586,927.50/443,633.45
  6. Step 6: Final answer
    x = 328,542.83

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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.