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Finding the Fourth Proportional to 419,906.10, 629,859.15 and 260,109.30

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Solution

The fourth proportional to 419,906.10, 629,859.15 and 260,109.30 is: 390,163.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,906.10 : 629,859.15 = 260,109.30 : x
  2. Step 2: Convert to fraction form
    419,906.10/629,859.15 = 260,109.30/x
  3. Step 3: Cross multiply
    419,906.10x = 629,859.15 × 260,109.30
  4. Step 4: Simplify right side
    419,906.10x = 163,832,222,605.10
  5. Step 5: Solve for x
    x = 163,832,222,605.10/419,906.10
  6. Step 6: Final answer
    x = 390,163.95

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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.