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Finding the Fourth Proportional to 481,997.97, 665,005.19 and 278,021.54

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Solution

The fourth proportional to 481,997.97, 665,005.19 and 278,021.54 is: 383,582.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,997.97 : 665,005.19 = 278,021.54 : x
  2. Step 2: Convert to fraction form
    481,997.97/665,005.19 = 278,021.54/x
  3. Step 3: Cross multiply
    481,997.97x = 665,005.19 × 278,021.54
  4. Step 4: Simplify right side
    481,997.97x = 184,885,767,031.79
  5. Step 5: Solve for x
    x = 184,885,767,031.79/481,997.97
  6. Step 6: Final answer
    x = 383,582.05

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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.