Home / 419,723.78-629,675.64-135,430.61

Finding the Fourth Proportional to 419,723.78, 629,675.64 and 135,430.61

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Solution

The fourth proportional to 419,723.78, 629,675.64 and 135,430.61 is: 203,174.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,723.78 : 629,675.64 = 135,430.61 : x
  2. Step 2: Convert to fraction form
    419,723.78/629,675.64 = 135,430.61/x
  3. Step 3: Cross multiply
    419,723.78x = 629,675.64 × 135,430.61
  4. Step 4: Simplify right side
    419,723.78x = 85,277,352,878.96
  5. Step 5: Solve for x
    x = 85,277,352,878.96/419,723.78
  6. Step 6: Final answer
    x = 203,174.94

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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.