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Finding the Fourth Proportional to 425,741.54, 638,735.63 and 126,227.84

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Solution

The fourth proportional to 425,741.54, 638,735.63 and 126,227.84 is: 189,378.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,741.54 : 638,735.63 = 126,227.84 : x
  2. Step 2: Convert to fraction form
    425,741.54/638,735.63 = 126,227.84/x
  3. Step 3: Cross multiply
    425,741.54x = 638,735.63 × 126,227.84
  4. Step 4: Simplify right side
    425,741.54x = 80,626,215,081.12
  5. Step 5: Solve for x
    x = 80,626,215,081.12/425,741.54
  6. Step 6: Final answer
    x = 189,378.32

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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.