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Finding the Fourth Proportional to 381,440.70, 572,161.05 and 100,986.30

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Solution

The fourth proportional to 381,440.70, 572,161.05 and 100,986.30 is: 151,479.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,440.70 : 572,161.05 = 100,986.30 : x
  2. Step 2: Convert to fraction form
    381,440.70/572,161.05 = 100,986.30/x
  3. Step 3: Cross multiply
    381,440.70x = 572,161.05 × 100,986.30
  4. Step 4: Simplify right side
    381,440.70x = 57,780,427,443.62
  5. Step 5: Solve for x
    x = 57,780,427,443.62/381,440.70
  6. Step 6: Final answer
    x = 151,479.45

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Similar ratio
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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.