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Finding the Fourth Proportional to 547,712.70, 755,858.94 and 306,021.90

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Solution

The fourth proportional to 547,712.70, 755,858.94 and 306,021.90 is: 422,318.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,712.70 : 755,858.94 = 306,021.90 : x
  2. Step 2: Convert to fraction form
    547,712.70/755,858.94 = 306,021.90/x
  3. Step 3: Cross multiply
    547,712.70x = 755,858.94 × 306,021.90
  4. Step 4: Simplify right side
    547,712.70x = 231,309,388,950.79
  5. Step 5: Solve for x
    x = 231,309,388,950.79/547,712.70
  6. Step 6: Final answer
    x = 422,318.83

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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.