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Finding the Fourth Proportional to 629,791.68, 869,069.04 and 354,190.80

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Solution

The fourth proportional to 629,791.68, 869,069.04 and 354,190.80 is: 488,758.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,791.68 : 869,069.04 = 354,190.80 : x
  2. Step 2: Convert to fraction form
    629,791.68/869,069.04 = 354,190.80/x
  3. Step 3: Cross multiply
    629,791.68x = 869,069.04 × 354,190.80
  4. Step 4: Simplify right side
    629,791.68x = 307,816,258,532.83
  5. Step 5: Solve for x
    x = 307,816,258,532.83/629,791.68
  6. Step 6: Final answer
    x = 488,758.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.