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Finding the Fourth Proportional to 381,393.82, 526,335.33 and 211,643.74

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Solution

The fourth proportional to 381,393.82, 526,335.33 and 211,643.74 is: 292,074.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,393.82 : 526,335.33 = 211,643.74 : x
  2. Step 2: Convert to fraction form
    381,393.82/526,335.33 = 211,643.74/x
  3. Step 3: Cross multiply
    381,393.82x = 526,335.33 × 211,643.74
  4. Step 4: Simplify right side
    381,393.82x = 111,395,577,735.33
  5. Step 5: Solve for x
    x = 111,395,577,735.33/381,393.82
  6. Step 6: Final answer
    x = 292,074.94

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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.