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Finding the Fourth Proportional to 262,808.45, 393,640.09 and 172,749.49

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Solution

The fourth proportional to 262,808.45, 393,640.09 and 172,749.49 is: 258,747.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,808.45 : 393,640.09 = 172,749.49 : x
  2. Step 2: Convert to fraction form
    262,808.45/393,640.09 = 172,749.49/x
  3. Step 3: Cross multiply
    262,808.45x = 393,640.09 × 172,749.49
  4. Step 4: Simplify right side
    262,808.45x = 68,001,124,791.05
  5. Step 5: Solve for x
    x = 68,001,124,791.05/262,808.45
  6. Step 6: Final answer
    x = 258,747.87

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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.