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Finding the Fourth Proportional to 644,910.80, 967,803.60 and 419,722.70

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Solution

The fourth proportional to 644,910.80, 967,803.60 and 419,722.70 is: 629,868.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,910.80 : 967,803.60 = 419,722.70 : x
  2. Step 2: Convert to fraction form
    644,910.80/967,803.60 = 419,722.70/x
  3. Step 3: Cross multiply
    644,910.80x = 967,803.60 × 419,722.70
  4. Step 4: Simplify right side
    644,910.80x = 406,209,140,061.72
  5. Step 5: Solve for x
    x = 406,209,140,061.72/644,910.80
  6. Step 6: Final answer
    x = 629,868.72

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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.