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Finding the Fourth Proportional to 642,558.28, 886,735.38 and 356,083

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Solution

The fourth proportional to 642,558.28, 886,735.38 and 356,083 is: 491,397.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,558.28 : 886,735.38 = 356,083 : x
  2. Step 2: Convert to fraction form
    642,558.28/886,735.38 = 356,083/x
  3. Step 3: Cross multiply
    642,558.28x = 886,735.38 × 356,083
  4. Step 4: Simplify right side
    642,558.28x = 315,751,394,316.54
  5. Step 5: Solve for x
    x = 315,751,394,316.54/642,558.28
  6. Step 6: Final answer
    x = 491,397.29

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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.