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Finding the Fourth Proportional to 423,855.73, 635,161.50 and 213,203.89

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Solution

The fourth proportional to 423,855.73, 635,161.50 and 213,203.89 is: 319,492.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,855.73 : 635,161.50 = 213,203.89 : x
  2. Step 2: Convert to fraction form
    423,855.73/635,161.50 = 213,203.89/x
  3. Step 3: Cross multiply
    423,855.73x = 635,161.50 × 213,203.89
  4. Step 4: Simplify right side
    423,855.73x = 135,418,902,578.24
  5. Step 5: Solve for x
    x = 135,418,902,578.24/423,855.73
  6. Step 6: Final answer
    x = 319,492.91

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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.