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Finding the Fourth Proportional to 381,476.95, 572,220.90 and 115,239.78

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Solution

The fourth proportional to 381,476.95, 572,220.90 and 115,239.78 is: 172,861.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,476.95 : 572,220.90 = 115,239.78 : x
  2. Step 2: Convert to fraction form
    381,476.95/572,220.90 = 115,239.78/x
  3. Step 3: Cross multiply
    381,476.95x = 572,220.90 × 115,239.78
  4. Step 4: Simplify right side
    381,476.95x = 65,942,610,627.40
  5. Step 5: Solve for x
    x = 65,942,610,627.40/381,476.95
  6. Step 6: Final answer
    x = 172,861.33

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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.