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Finding the Fourth Proportional to 381,008.22, 571,112.20 and 128,200.94

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Solution

The fourth proportional to 381,008.22, 571,112.20 and 128,200.94 is: 192,166.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,008.22 : 571,112.20 = 128,200.94 : x
  2. Step 2: Convert to fraction form
    381,008.22/571,112.20 = 128,200.94/x
  3. Step 3: Cross multiply
    381,008.22x = 571,112.20 × 128,200.94
  4. Step 4: Simplify right side
    381,008.22x = 73,217,120,885.47
  5. Step 5: Solve for x
    x = 73,217,120,885.47/381,008.22
  6. Step 6: Final answer
    x = 192,166.77

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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.