Home / 427,653.78-641,623.17-143,372.43

Finding the Fourth Proportional to 427,653.78, 641,623.17 and 143,372.43

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Solution

The fourth proportional to 427,653.78, 641,623.17 and 143,372.43 is: 215,106.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,653.78 : 641,623.17 = 143,372.43 : x
  2. Step 2: Convert to fraction form
    427,653.78/641,623.17 = 143,372.43/x
  3. Step 3: Cross multiply
    427,653.78x = 641,623.17 × 143,372.43
  4. Step 4: Simplify right side
    427,653.78x = 91,991,073,564.85
  5. Step 5: Solve for x
    x = 91,991,073,564.85/427,653.78
  6. Step 6: Final answer
    x = 215,106.42

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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.