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Finding the Fourth Proportional to 381,257.72, 571,487.52 and 128,450.86

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Solution

The fourth proportional to 381,257.72, 571,487.52 and 128,450.86 is: 192,541.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,257.72 : 571,487.52 = 128,450.86 : x
  2. Step 2: Convert to fraction form
    381,257.72/571,487.52 = 128,450.86/x
  3. Step 3: Cross multiply
    381,257.72x = 571,487.52 × 128,450.86
  4. Step 4: Simplify right side
    381,257.72x = 73,408,063,423.27
  5. Step 5: Solve for x
    x = 73,408,063,423.27/381,257.72
  6. Step 6: Final answer
    x = 192,541.84

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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.