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Finding the Fourth Proportional to 381,618.39, 572,447.84 and 115,372.11

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Solution

The fourth proportional to 381,618.39, 572,447.84 and 115,372.11 is: 173,064.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,618.39 : 572,447.84 = 115,372.11 : x
  2. Step 2: Convert to fraction form
    381,618.39/572,447.84 = 115,372.11/x
  3. Step 3: Cross multiply
    381,618.39x = 572,447.84 × 115,372.11
  4. Step 4: Simplify right side
    381,618.39x = 66,044,514,588.88
  5. Step 5: Solve for x
    x = 66,044,514,588.88/381,618.39
  6. Step 6: Final answer
    x = 173,064.29

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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.