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Finding the Fourth Proportional to 381,251.40, 526,190 and 211,540.20

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Solution

The fourth proportional to 381,251.40, 526,190 and 211,540.20 is: 291,960.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,251.40 : 526,190 = 211,540.20 : x
  2. Step 2: Convert to fraction form
    381,251.40/526,190 = 211,540.20/x
  3. Step 3: Cross multiply
    381,251.40x = 526,190 × 211,540.20
  4. Step 4: Simplify right side
    381,251.40x = 111,310,337,838
  5. Step 5: Solve for x
    x = 111,310,337,838/381,251.40
  6. Step 6: Final answer
    x = 291,960.47

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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.