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Finding the Fourth Proportional to 381,479.31, 526,442.90 and 211,713.44

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Solution

The fourth proportional to 381,479.31, 526,442.90 and 211,713.44 is: 292,165.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,479.31 : 526,442.90 = 211,713.44 : x
  2. Step 2: Convert to fraction form
    381,479.31/526,442.90 = 211,713.44/x
  3. Step 3: Cross multiply
    381,479.31x = 526,442.90 × 211,713.44
  4. Step 4: Simplify right side
    381,479.31x = 111,455,033,631.79
  5. Step 5: Solve for x
    x = 111,455,033,631.79/381,479.31
  6. Step 6: Final answer
    x = 292,165.34

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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.