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Finding the Fourth Proportional to 207,469.90, 311,358.45 and 82,900.30

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Solution

The fourth proportional to 207,469.90, 311,358.45 and 82,900.30 is: 124,411.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,469.90 : 311,358.45 = 82,900.30 : x
  2. Step 2: Convert to fraction form
    207,469.90/311,358.45 = 82,900.30/x
  3. Step 3: Cross multiply
    207,469.90x = 311,358.45 × 82,900.30
  4. Step 4: Simplify right side
    207,469.90x = 25,811,708,912.54
  5. Step 5: Solve for x
    x = 25,811,708,912.54/207,469.90
  6. Step 6: Final answer
    x = 124,411.83

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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.