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Finding the Fourth Proportional to 425,843.69, 638,898.78 and 126,325.84

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Solution

The fourth proportional to 425,843.69, 638,898.78 and 126,325.84 is: 189,528.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,843.69 : 638,898.78 = 126,325.84 : x
  2. Step 2: Convert to fraction form
    425,843.69/638,898.78 = 126,325.84/x
  3. Step 3: Cross multiply
    425,843.69x = 638,898.78 × 126,325.84
  4. Step 4: Simplify right side
    425,843.69x = 80,709,421,232.35
  5. Step 5: Solve for x
    x = 80,709,421,232.35/425,843.69
  6. Step 6: Final answer
    x = 189,528.28

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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.