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Finding the Fourth Proportional to 381,428.76, 526,373.73 and 211,662.90

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Solution

The fourth proportional to 381,428.76, 526,373.73 and 211,662.90 is: 292,095.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,428.76 : 526,373.73 = 211,662.90 : x
  2. Step 2: Convert to fraction form
    381,428.76/526,373.73 = 211,662.90/x
  3. Step 3: Cross multiply
    381,428.76x = 526,373.73 × 211,662.90
  4. Step 4: Simplify right side
    381,428.76x = 111,413,790,175.62
  5. Step 5: Solve for x
    x = 111,413,790,175.62/381,428.76
  6. Step 6: Final answer
    x = 292,095.93

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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.