Home / 312,712.31-431,589.32-198,001.62

Finding the Fourth Proportional to 312,712.31, 431,589.32 and 198,001.62

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Solution

The fourth proportional to 312,712.31, 431,589.32 and 198,001.62 is: 273,271.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,712.31 : 431,589.32 = 198,001.62 : x
  2. Step 2: Convert to fraction form
    312,712.31/431,589.32 = 198,001.62/x
  3. Step 3: Cross multiply
    312,712.31x = 431,589.32 × 198,001.62
  4. Step 4: Simplify right side
    312,712.31x = 85,455,383,544.69
  5. Step 5: Solve for x
    x = 85,455,383,544.69/312,712.31
  6. Step 6: Final answer
    x = 273,271.57

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1.5x scale

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.