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Finding the Fourth Proportional to 644,612.80, 967,356.60 and 419,424.70

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Solution

The fourth proportional to 644,612.80, 967,356.60 and 419,424.70 is: 629,421.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,612.80 : 967,356.60 = 419,424.70 : x
  2. Step 2: Convert to fraction form
    644,612.80/967,356.60 = 419,424.70/x
  3. Step 3: Cross multiply
    644,612.80x = 967,356.60 × 419,424.70
  4. Step 4: Simplify right side
    644,612.80x = 405,733,251,748.02
  5. Step 5: Solve for x
    x = 405,733,251,748.02/644,612.80
  6. Step 6: Final answer
    x = 629,421.65

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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.