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Finding the Fourth Proportional to 425,395.63, 638,105.82 and 159,105.34

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Solution

The fourth proportional to 425,395.63, 638,105.82 and 159,105.34 is: 238,662.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,395.63 : 638,105.82 = 159,105.34 : x
  2. Step 2: Convert to fraction form
    425,395.63/638,105.82 = 159,105.34/x
  3. Step 3: Cross multiply
    425,395.63x = 638,105.82 × 159,105.34
  4. Step 4: Simplify right side
    425,395.63x = 101,526,043,447.08
  5. Step 5: Solve for x
    x = 101,526,043,447.08/425,395.63
  6. Step 6: Final answer
    x = 238,662.64

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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.