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Finding the Fourth Proportional to 381,415.89, 572,135.63 and 191,883.97

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Solution

The fourth proportional to 381,415.89, 572,135.63 and 191,883.97 is: 287,831.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,415.89 : 572,135.63 = 191,883.97 : x
  2. Step 2: Convert to fraction form
    381,415.89/572,135.63 = 191,883.97/x
  3. Step 3: Cross multiply
    381,415.89x = 572,135.63 × 191,883.97
  4. Step 4: Simplify right side
    381,415.89x = 109,783,653,673.09
  5. Step 5: Solve for x
    x = 109,783,653,673.09/381,415.89
  6. Step 6: Final answer
    x = 287,831.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.