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Finding the Fourth Proportional to 425,656.29, 638,607.75 and 126,142.59

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Solution

The fourth proportional to 425,656.29, 638,607.75 and 126,142.59 is: 189,250.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,656.29 : 638,607.75 = 126,142.59 : x
  2. Step 2: Convert to fraction form
    425,656.29/638,607.75 = 126,142.59/x
  3. Step 3: Cross multiply
    425,656.29x = 638,607.75 × 126,142.59
  4. Step 4: Simplify right side
    425,656.29x = 80,555,635,579.07
  5. Step 5: Solve for x
    x = 80,555,635,579.07/425,656.29
  6. Step 6: Final answer
    x = 189,250.43

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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.