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Finding the Fourth Proportional to 307,997.85, 425,032.47 and 172,033.78

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Solution

The fourth proportional to 307,997.85, 425,032.47 and 172,033.78 is: 237,404.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,997.85 : 425,032.47 = 172,033.78 : x
  2. Step 2: Convert to fraction form
    307,997.85/425,032.47 = 172,033.78/x
  3. Step 3: Cross multiply
    307,997.85x = 425,032.47 × 172,033.78
  4. Step 4: Simplify right side
    307,997.85x = 73,119,942,436.84
  5. Step 5: Solve for x
    x = 73,119,942,436.84/307,997.85
  6. Step 6: Final answer
    x = 237,404.07

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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.