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Finding the Fourth Proportional to 381,244.22, 526,140.87 and 220,128.74

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Solution

The fourth proportional to 381,244.22, 526,140.87 and 220,128.74 is: 303,791.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,244.22 : 526,140.87 = 220,128.74 : x
  2. Step 2: Convert to fraction form
    381,244.22/526,140.87 = 220,128.74/x
  3. Step 3: Cross multiply
    381,244.22x = 526,140.87 × 220,128.74
  4. Step 4: Simplify right side
    381,244.22x = 115,818,726,775.60
  5. Step 5: Solve for x
    x = 115,818,726,775.60/381,244.22
  6. Step 6: Final answer
    x = 303,791.43

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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.