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Finding the Fourth Proportional to 381,696.70, 572,545.05 and 221,608.30

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Solution

The fourth proportional to 381,696.70, 572,545.05 and 221,608.30 is: 332,412.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,696.70 : 572,545.05 = 221,608.30 : x
  2. Step 2: Convert to fraction form
    381,696.70/572,545.05 = 221,608.30/x
  3. Step 3: Cross multiply
    381,696.70x = 572,545.05 × 221,608.30
  4. Step 4: Simplify right side
    381,696.70x = 126,880,735,203.92
  5. Step 5: Solve for x
    x = 126,880,735,203.92/381,696.70
  6. Step 6: Final answer
    x = 332,412.45

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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.