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Finding the Fourth Proportional to 381,814.45, 526,905.18 and 212,048.57

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Solution

The fourth proportional to 381,814.45, 526,905.18 and 212,048.57 is: 292,627.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,814.45 : 526,905.18 = 212,048.57 : x
  2. Step 2: Convert to fraction form
    381,814.45/526,905.18 = 212,048.57/x
  3. Step 3: Cross multiply
    381,814.45x = 526,905.18 × 212,048.57
  4. Step 4: Simplify right side
    381,814.45x = 111,729,491,261.86
  5. Step 5: Solve for x
    x = 111,729,491,261.86/381,814.45
  6. Step 6: Final answer
    x = 292,627.72

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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.