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Finding the Fourth Proportional to 499,640.80, 689,520.72 and 273,286.32

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Solution

The fourth proportional to 499,640.80, 689,520.72 and 273,286.32 is: 377,144.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,640.80 : 689,520.72 = 273,286.32 : x
  2. Step 2: Convert to fraction form
    499,640.80/689,520.72 = 273,286.32/x
  3. Step 3: Cross multiply
    499,640.80x = 689,520.72 × 273,286.32
  4. Step 4: Simplify right side
    499,640.80x = 188,436,580,132.55
  5. Step 5: Solve for x
    x = 188,436,580,132.55/499,640.80
  6. Step 6: Final answer
    x = 377,144.10

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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.