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Finding the Fourth Proportional to 426,119.67, 639,180.42 and 173,221.68

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Solution

The fourth proportional to 426,119.67, 639,180.42 and 173,221.68 is: 259,832.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,119.67 : 639,180.42 = 173,221.68 : x
  2. Step 2: Convert to fraction form
    426,119.67/639,180.42 = 173,221.68/x
  3. Step 3: Cross multiply
    426,119.67x = 639,180.42 × 173,221.68
  4. Step 4: Simplify right side
    426,119.67x = 110,719,906,175.51
  5. Step 5: Solve for x
    x = 110,719,906,175.51/426,119.67
  6. Step 6: Final answer
    x = 259,832.89

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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.