Home / 428,021.56-641,682.06-161,630.92

Finding the Fourth Proportional to 428,021.56, 641,682.06 and 161,630.92

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Solution

The fourth proportional to 428,021.56, 641,682.06 and 161,630.92 is: 242,314.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,021.56 : 641,682.06 = 161,630.92 : x
  2. Step 2: Convert to fraction form
    428,021.56/641,682.06 = 161,630.92/x
  3. Step 3: Cross multiply
    428,021.56x = 641,682.06 × 161,630.92
  4. Step 4: Simplify right side
    428,021.56x = 103,715,661,705.30
  5. Step 5: Solve for x
    x = 103,715,661,705.30/428,021.56
  6. Step 6: Final answer
    x = 242,314.11

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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.