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Finding the Fourth Proportional to 722,076.64, 996,480.96 and 395,403.42

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Solution

The fourth proportional to 722,076.64, 996,480.96 and 395,403.42 is: 545,665.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,076.64 : 996,480.96 = 395,403.42 : x
  2. Step 2: Convert to fraction form
    722,076.64/996,480.96 = 395,403.42/x
  3. Step 3: Cross multiply
    722,076.64x = 996,480.96 × 395,403.42
  4. Step 4: Simplify right side
    722,076.64x = 394,011,979,548.88
  5. Step 5: Solve for x
    x = 394,011,979,548.88/722,076.64
  6. Step 6: Final answer
    x = 545,665.04

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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.