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Finding the Fourth Proportional to 396,640.80, 594,086.40 and 238,593.60

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Solution

The fourth proportional to 396,640.80, 594,086.40 and 238,593.60 is: 357,364.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,640.80 : 594,086.40 = 238,593.60 : x
  2. Step 2: Convert to fraction form
    396,640.80/594,086.40 = 238,593.60/x
  3. Step 3: Cross multiply
    396,640.80x = 594,086.40 × 238,593.60
  4. Step 4: Simplify right side
    396,640.80x = 141,745,212,887.04
  5. Step 5: Solve for x
    x = 141,745,212,887.04/396,640.80
  6. Step 6: Final answer
    x = 357,364.18

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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.