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Finding the Fourth Proportional to 425,576.38, 638,457.93 and 126,080.37

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Solution

The fourth proportional to 425,576.38, 638,457.93 and 126,080.37 is: 189,148.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,576.38 : 638,457.93 = 126,080.37 : x
  2. Step 2: Convert to fraction form
    425,576.38/638,457.93 = 126,080.37/x
  3. Step 3: Cross multiply
    425,576.38x = 638,457.93 × 126,080.37
  4. Step 4: Simplify right side
    425,576.38x = 80,497,008,851.54
  5. Step 5: Solve for x
    x = 80,497,008,851.54/425,576.38
  6. Step 6: Final answer
    x = 189,148.21

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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.