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Finding the Fourth Proportional to 483,774.12, 725,647.82 and 128,791.22

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Solution

The fourth proportional to 483,774.12, 725,647.82 and 128,791.22 is: 193,183.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,774.12 : 725,647.82 = 128,791.22 : x
  2. Step 2: Convert to fraction form
    483,774.12/725,647.82 = 128,791.22/x
  3. Step 3: Cross multiply
    483,774.12x = 725,647.82 × 128,791.22
  4. Step 4: Simplify right side
    483,774.12x = 93,457,063,755.95
  5. Step 5: Solve for x
    x = 93,457,063,755.95/483,774.12
  6. Step 6: Final answer
    x = 193,183.26

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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.