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Finding the Fourth Proportional to 381,029.59, 571,607.57 and 128,331.46

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Solution

The fourth proportional to 381,029.59, 571,607.57 and 128,331.46 is: 192,518.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,029.59 : 571,607.57 = 128,331.46 : x
  2. Step 2: Convert to fraction form
    381,029.59/571,607.57 = 128,331.46/x
  3. Step 3: Cross multiply
    381,029.59x = 571,607.57 × 128,331.46
  4. Step 4: Simplify right side
    381,029.59x = 73,355,234,005.15
  5. Step 5: Solve for x
    x = 73,355,234,005.15/381,029.59
  6. Step 6: Final answer
    x = 192,518.47

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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.