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Finding the Fourth Proportional to 381,674.70, 572,512.05 and 343,620.90

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Solution

The fourth proportional to 381,674.70, 572,512.05 and 343,620.90 is: 515,431.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,674.70 : 572,512.05 = 343,620.90 : x
  2. Step 2: Convert to fraction form
    381,674.70/572,512.05 = 343,620.90/x
  3. Step 3: Cross multiply
    381,674.70x = 572,512.05 × 343,620.90
  4. Step 4: Simplify right side
    381,674.70x = 196,727,105,881.85
  5. Step 5: Solve for x
    x = 196,727,105,881.85/381,674.70
  6. Step 6: Final answer
    x = 515,431.35

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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.