Home / 428,020.56-641,680.56-161,629.92

Finding the Fourth Proportional to 428,020.56, 641,680.56 and 161,629.92

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Solution

The fourth proportional to 428,020.56, 641,680.56 and 161,629.92 is: 242,312.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,020.56 : 641,680.56 = 161,629.92 : x
  2. Step 2: Convert to fraction form
    428,020.56/641,680.56 = 161,629.92/x
  3. Step 3: Cross multiply
    428,020.56x = 641,680.56 × 161,629.92
  4. Step 4: Simplify right side
    428,020.56x = 103,714,777,578.36
  5. Step 5: Solve for x
    x = 103,714,777,578.36/428,020.56
  6. Step 6: Final answer
    x = 242,312.61

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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.