Home / 312,728.39-431,611.59-198,017.74

Finding the Fourth Proportional to 312,728.39, 431,611.59 and 198,017.74

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Solution

The fourth proportional to 312,728.39, 431,611.59 and 198,017.74 is: 273,293.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,728.39 : 431,611.59 = 198,017.74 : x
  2. Step 2: Convert to fraction form
    312,728.39/431,611.59 = 198,017.74/x
  3. Step 3: Cross multiply
    312,728.39x = 431,611.59 × 198,017.74
  4. Step 4: Simplify right side
    312,728.39x = 85,466,750,563.93
  5. Step 5: Solve for x
    x = 85,466,750,563.93/312,728.39
  6. Step 6: Final answer
    x = 273,293.86

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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.