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Finding the Fourth Proportional to 425,634.90, 638,313.42 and 141,249.06

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Solution

The fourth proportional to 425,634.90, 638,313.42 and 141,249.06 is: 211,827.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,634.90 : 638,313.42 = 141,249.06 : x
  2. Step 2: Convert to fraction form
    425,634.90/638,313.42 = 141,249.06/x
  3. Step 3: Cross multiply
    425,634.90x = 638,313.42 × 141,249.06
  4. Step 4: Simplify right side
    425,634.90x = 90,161,170,560.39
  5. Step 5: Solve for x
    x = 90,161,170,560.39/425,634.90
  6. Step 6: Final answer
    x = 211,827.49

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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.