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Finding the Fourth Proportional to 322,930.70, 445,706.04 and 213,842.76

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Solution

The fourth proportional to 322,930.70, 445,706.04 and 213,842.76 is: 295,143.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,930.70 : 445,706.04 = 213,842.76 : x
  2. Step 2: Convert to fraction form
    322,930.70/445,706.04 = 213,842.76/x
  3. Step 3: Cross multiply
    322,930.70x = 445,706.04 × 213,842.76
  4. Step 4: Simplify right side
    322,930.70x = 95,311,009,742.27
  5. Step 5: Solve for x
    x = 95,311,009,742.27/322,930.70
  6. Step 6: Final answer
    x = 295,143.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.