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Finding the Fourth Proportional to 381,670.20, 572,286.60 and 115,390.80

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Solution

The fourth proportional to 381,670.20, 572,286.60 and 115,390.80 is: 173,020.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,670.20 : 572,286.60 = 115,390.80 : x
  2. Step 2: Convert to fraction form
    381,670.20/572,286.60 = 115,390.80/x
  3. Step 3: Cross multiply
    381,670.20x = 572,286.60 × 115,390.80
  4. Step 4: Simplify right side
    381,670.20x = 66,036,608,603.28
  5. Step 5: Solve for x
    x = 66,036,608,603.28/381,670.20
  6. Step 6: Final answer
    x = 173,020.08

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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.