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Finding the Fourth Proportional to 381,310.10, 571,855.80 and 115,006.40

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Solution

The fourth proportional to 381,310.10, 571,855.80 and 115,006.40 is: 172,476.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,310.10 : 571,855.80 = 115,006.40 : x
  2. Step 2: Convert to fraction form
    381,310.10/571,855.80 = 115,006.40/x
  3. Step 3: Cross multiply
    381,310.10x = 571,855.80 × 115,006.40
  4. Step 4: Simplify right side
    381,310.10x = 65,767,076,877.12
  5. Step 5: Solve for x
    x = 65,767,076,877.12/381,310.10
  6. Step 6: Final answer
    x = 172,476.62

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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.