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Finding the Fourth Proportional to 309,638.07, 427,266.38 and 173,644.04

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Solution

The fourth proportional to 309,638.07, 427,266.38 and 173,644.04 is: 239,609.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,638.07 : 427,266.38 = 173,644.04 : x
  2. Step 2: Convert to fraction form
    309,638.07/427,266.38 = 173,644.04/x
  3. Step 3: Cross multiply
    309,638.07x = 427,266.38 × 173,644.04
  4. Step 4: Simplify right side
    309,638.07x = 74,192,257,374.82
  5. Step 5: Solve for x
    x = 74,192,257,374.82/309,638.07
  6. Step 6: Final answer
    x = 239,609.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.