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Finding the Fourth Proportional to 664,078.22, 916,313.50 and 373,649.48

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Solution

The fourth proportional to 664,078.22, 916,313.50 and 373,649.48 is: 515,571.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,078.22 : 916,313.50 = 373,649.48 : x
  2. Step 2: Convert to fraction form
    664,078.22/916,313.50 = 373,649.48/x
  3. Step 3: Cross multiply
    664,078.22x = 916,313.50 × 373,649.48
  4. Step 4: Simplify right side
    664,078.22x = 342,380,062,791.98
  5. Step 5: Solve for x
    x = 342,380,062,791.98/664,078.22
  6. Step 6: Final answer
    x = 515,571.89

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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.