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Finding the Fourth Proportional to 644,429.80, 966,990.30 and 270,490.60

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Solution

The fourth proportional to 644,429.80, 966,990.30 and 270,490.60 is: 405,880.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,429.80 : 966,990.30 = 270,490.60 : x
  2. Step 2: Convert to fraction form
    644,429.80/966,990.30 = 270,490.60/x
  3. Step 3: Cross multiply
    644,429.80x = 966,990.30 × 270,490.60
  4. Step 4: Simplify right side
    644,429.80x = 261,561,786,441.18
  5. Step 5: Solve for x
    x = 261,561,786,441.18/644,429.80
  6. Step 6: Final answer
    x = 405,880.96

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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.