Home / 642,105.09-886,112.46-355,629.96

Finding the Fourth Proportional to 642,105.09, 886,112.46 and 355,629.96

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Solution

The fourth proportional to 642,105.09, 886,112.46 and 355,629.96 is: 490,773.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,105.09 : 886,112.46 = 355,629.96 : x
  2. Step 2: Convert to fraction form
    642,105.09/886,112.46 = 355,629.96/x
  3. Step 3: Cross multiply
    642,105.09x = 886,112.46 × 355,629.96
  4. Step 4: Simplify right side
    642,105.09x = 315,128,138,705.30
  5. Step 5: Solve for x
    x = 315,128,138,705.30/642,105.09
  6. Step 6: Final answer
    x = 490,773.46

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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.