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Finding the Fourth Proportional to 644,198.72, 888,997.02 and 357,717.92

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Solution

The fourth proportional to 644,198.72, 888,997.02 and 357,717.92 is: 493,652.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,198.72 : 888,997.02 = 357,717.92 : x
  2. Step 2: Convert to fraction form
    644,198.72/888,997.02 = 357,717.92/x
  3. Step 3: Cross multiply
    644,198.72x = 888,997.02 × 357,717.92
  4. Step 4: Simplify right side
    644,198.72x = 318,010,164,880.60
  5. Step 5: Solve for x
    x = 318,010,164,880.60/644,198.72
  6. Step 6: Final answer
    x = 493,652.28

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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.