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Finding the Fourth Proportional to 396,905.40, 595,358.10 and 247,606.20

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Solution

The fourth proportional to 396,905.40, 595,358.10 and 247,606.20 is: 371,409.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,905.40 : 595,358.10 = 247,606.20 : x
  2. Step 2: Convert to fraction form
    396,905.40/595,358.10 = 247,606.20/x
  3. Step 3: Cross multiply
    396,905.40x = 595,358.10 × 247,606.20
  4. Step 4: Simplify right side
    396,905.40x = 147,414,356,780.22
  5. Step 5: Solve for x
    x = 147,414,356,780.22/396,905.40
  6. Step 6: Final answer
    x = 371,409.30

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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.