Home / 427,644.10-641,608.65-143,362.75

Finding the Fourth Proportional to 427,644.10, 641,608.65 and 143,362.75

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Solution

The fourth proportional to 427,644.10, 641,608.65 and 143,362.75 is: 215,091.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,644.10 : 641,608.65 = 143,362.75 : x
  2. Step 2: Convert to fraction form
    427,644.10/641,608.65 = 143,362.75/x
  3. Step 3: Cross multiply
    427,644.10x = 641,608.65 × 143,362.75
  4. Step 4: Simplify right side
    427,644.10x = 91,982,780,487.79
  5. Step 5: Solve for x
    x = 91,982,780,487.79/427,644.10
  6. Step 6: Final answer
    x = 215,091.90

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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.