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Finding the Fourth Proportional to 695,202.48, 959,399.64 and 393,390

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Solution

The fourth proportional to 695,202.48, 959,399.64 and 393,390 is: 542,889.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    695,202.48 : 959,399.64 = 393,390 : x
  2. Step 2: Convert to fraction form
    695,202.48/959,399.64 = 393,390/x
  3. Step 3: Cross multiply
    695,202.48x = 959,399.64 × 393,390
  4. Step 4: Simplify right side
    695,202.48x = 377,418,224,379.60
  5. Step 5: Solve for x
    x = 377,418,224,379.60/695,202.48
  6. Step 6: Final answer
    x = 542,889.64

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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.