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Finding the Fourth Proportional to 381,813.31, 526,871.62 and 220,678.80

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Solution

The fourth proportional to 381,813.31, 526,871.62 and 220,678.80 is: 304,518.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,813.31 : 526,871.62 = 220,678.80 : x
  2. Step 2: Convert to fraction form
    381,813.31/526,871.62 = 220,678.80/x
  3. Step 3: Cross multiply
    381,813.31x = 526,871.62 × 220,678.80
  4. Step 4: Simplify right side
    381,813.31x = 116,269,396,855.66
  5. Step 5: Solve for x
    x = 116,269,396,855.66/381,813.31
  6. Step 6: Final answer
    x = 304,518.97

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1.5x scale

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.