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Finding the Fourth Proportional to 425,758.96, 638,653.52 and 105,912.48

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Solution

The fourth proportional to 425,758.96, 638,653.52 and 105,912.48 is: 158,872.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,758.96 : 638,653.52 = 105,912.48 : x
  2. Step 2: Convert to fraction form
    425,758.96/638,653.52 = 105,912.48/x
  3. Step 3: Cross multiply
    425,758.96x = 638,653.52 × 105,912.48
  4. Step 4: Simplify right side
    425,758.96x = 67,641,378,163.93
  5. Step 5: Solve for x
    x = 67,641,378,163.93/425,758.96
  6. Step 6: Final answer
    x = 158,872.47

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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.