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Finding the Fourth Proportional to 309,638.08, 427,266.37 and 173,644.04

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Solution

The fourth proportional to 309,638.08, 427,266.37 and 173,644.04 is: 239,609.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,638.08 : 427,266.37 = 173,644.04 : x
  2. Step 2: Convert to fraction form
    309,638.08/427,266.37 = 173,644.04/x
  3. Step 3: Cross multiply
    309,638.08x = 427,266.37 × 173,644.04
  4. Step 4: Simplify right side
    309,638.08x = 74,192,256,072.49
  5. Step 5: Solve for x
    x = 74,192,256,072.49/309,638.08
  6. Step 6: Final answer
    x = 239,609.60

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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.