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Finding the Fourth Proportional to 423,735.50, 635,644.87 and 139,310.69

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Solution

The fourth proportional to 423,735.50, 635,644.87 and 139,310.69 is: 208,979.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,735.50 : 635,644.87 = 139,310.69 : x
  2. Step 2: Convert to fraction form
    423,735.50/635,644.87 = 139,310.69/x
  3. Step 3: Cross multiply
    423,735.50x = 635,644.87 × 139,310.69
  4. Step 4: Simplify right side
    423,735.50x = 88,552,121,908.16
  5. Step 5: Solve for x
    x = 88,552,121,908.16/423,735.50
  6. Step 6: Final answer
    x = 208,979.71

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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.