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Finding the Fourth Proportional to 425,317.40, 638,100.84 and 125,805.86

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Solution

The fourth proportional to 425,317.40, 638,100.84 and 125,805.86 is: 188,745.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,317.40 : 638,100.84 = 125,805.86 : x
  2. Step 2: Convert to fraction form
    425,317.40/638,100.84 = 125,805.86/x
  3. Step 3: Cross multiply
    425,317.40x = 638,100.84 × 125,805.86
  4. Step 4: Simplify right side
    425,317.40x = 80,276,824,942.92
  5. Step 5: Solve for x
    x = 80,276,824,942.92/425,317.40
  6. Step 6: Final answer
    x = 188,745.69

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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.