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Finding the Fourth Proportional to 399,550.44, 551,391.48 and 218,265.38

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Solution

The fourth proportional to 399,550.44, 551,391.48 and 218,265.38 is: 301,212.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,550.44 : 551,391.48 = 218,265.38 : x
  2. Step 2: Convert to fraction form
    399,550.44/551,391.48 = 218,265.38/x
  3. Step 3: Cross multiply
    399,550.44x = 551,391.48 × 218,265.38
  4. Step 4: Simplify right side
    399,550.44x = 120,349,670,910.96
  5. Step 5: Solve for x
    x = 120,349,670,910.96/399,550.44
  6. Step 6: Final answer
    x = 301,212.71

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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.