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Finding the Fourth Proportional to 231,640.80, 347,461.20 and 220,815.15

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Solution

The fourth proportional to 231,640.80, 347,461.20 and 220,815.15 is: 331,222.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,640.80 : 347,461.20 = 220,815.15 : x
  2. Step 2: Convert to fraction form
    231,640.80/347,461.20 = 220,815.15/x
  3. Step 3: Cross multiply
    231,640.80x = 347,461.20 × 220,815.15
  4. Step 4: Simplify right side
    231,640.80x = 76,724,696,997.18
  5. Step 5: Solve for x
    x = 76,724,696,997.18/231,640.80
  6. Step 6: Final answer
    x = 331,222.73

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1.5x scale

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.