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Finding the Fourth Proportional to 318,739.66, 475,777.46 and 280,906.79

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Solution

The fourth proportional to 318,739.66, 475,777.46 and 280,906.79 is: 419,304.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,739.66 : 475,777.46 = 280,906.79 : x
  2. Step 2: Convert to fraction form
    318,739.66/475,777.46 = 280,906.79/x
  3. Step 3: Cross multiply
    318,739.66x = 475,777.46 × 280,906.79
  4. Step 4: Simplify right side
    318,739.66x = 133,649,117,366.33
  5. Step 5: Solve for x
    x = 133,649,117,366.33/318,739.66
  6. Step 6: Final answer
    x = 419,304.95

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.