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Finding the Fourth Proportional to 663,346.40, 994,436.40 and 397,212.80

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Solution

The fourth proportional to 663,346.40, 994,436.40 and 397,212.80 is: 595,469.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,346.40 : 994,436.40 = 397,212.80 : x
  2. Step 2: Convert to fraction form
    663,346.40/994,436.40 = 397,212.80/x
  3. Step 3: Cross multiply
    663,346.40x = 994,436.40 × 397,212.80
  4. Step 4: Simplify right side
    663,346.40x = 395,002,866,865.92
  5. Step 5: Solve for x
    x = 395,002,866,865.92/663,346.40
  6. Step 6: Final answer
    x = 595,469.98

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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.