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Finding the Fourth Proportional to 455,940.70, 683,451.78 and 219,154.21

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Solution

The fourth proportional to 455,940.70, 683,451.78 and 219,154.21 is: 328,510.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,940.70 : 683,451.78 = 219,154.21 : x
  2. Step 2: Convert to fraction form
    455,940.70/683,451.78 = 219,154.21/x
  3. Step 3: Cross multiply
    455,940.70x = 683,451.78 × 219,154.21
  4. Step 4: Simplify right side
    455,940.70x = 149,781,332,388.54
  5. Step 5: Solve for x
    x = 149,781,332,388.54/455,940.70
  6. Step 6: Final answer
    x = 328,510.56

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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.