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Finding the Fourth Proportional to 425,804.40, 638,709.24 and 126,287.44

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Solution

The fourth proportional to 425,804.40, 638,709.24 and 126,287.44 is: 189,431.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,804.40 : 638,709.24 = 126,287.44 : x
  2. Step 2: Convert to fraction form
    425,804.40/638,709.24 = 126,287.44/x
  3. Step 3: Cross multiply
    425,804.40x = 638,709.24 × 126,287.44
  4. Step 4: Simplify right side
    425,804.40x = 80,660,954,823.95
  5. Step 5: Solve for x
    x = 80,660,954,823.95/425,804.40
  6. Step 6: Final answer
    x = 189,431.94

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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.