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Finding the Fourth Proportional to 381,285.76, 526,172.74 and 211,519.89

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Solution

The fourth proportional to 381,285.76, 526,172.74 and 211,519.89 is: 291,896.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,285.76 : 526,172.74 = 211,519.89 : x
  2. Step 2: Convert to fraction form
    381,285.76/526,172.74 = 211,519.89/x
  3. Step 3: Cross multiply
    381,285.76x = 526,172.74 × 211,519.89
  4. Step 4: Simplify right side
    381,285.76x = 111,296,000,085.80
  5. Step 5: Solve for x
    x = 111,296,000,085.80/381,285.76
  6. Step 6: Final answer
    x = 291,896.56

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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.