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Finding the Fourth Proportional to 419,740.40, 629,764.20 and 170,447.60

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Solution

The fourth proportional to 419,740.40, 629,764.20 and 170,447.60 is: 255,733.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,740.40 : 629,764.20 = 170,447.60 : x
  2. Step 2: Convert to fraction form
    419,740.40/629,764.20 = 170,447.60/x
  3. Step 3: Cross multiply
    419,740.40x = 629,764.20 × 170,447.60
  4. Step 4: Simplify right side
    419,740.40x = 107,341,796,455.92
  5. Step 5: Solve for x
    x = 107,341,796,455.92/419,740.40
  6. Step 6: Final answer
    x = 255,733.77

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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.