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Finding the Fourth Proportional to 381,990.64, 527,150.28 and 212,227.60

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Solution

The fourth proportional to 381,990.64, 527,150.28 and 212,227.60 is: 292,875.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,990.64 : 527,150.28 = 212,227.60 : x
  2. Step 2: Convert to fraction form
    381,990.64/527,150.28 = 212,227.60/x
  3. Step 3: Cross multiply
    381,990.64x = 527,150.28 × 212,227.60
  4. Step 4: Simplify right side
    381,990.64x = 111,875,838,763.73
  5. Step 5: Solve for x
    x = 111,875,838,763.73/381,990.64
  6. Step 6: Final answer
    x = 292,875.86

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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.