Home / 312,716.50-431,595.09-198,005.81

Finding the Fourth Proportional to 312,716.50, 431,595.09 and 198,005.81

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Solution

The fourth proportional to 312,716.50, 431,595.09 and 198,005.81 is: 273,277.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,716.50 : 431,595.09 = 198,005.81 : x
  2. Step 2: Convert to fraction form
    312,716.50/431,595.09 = 198,005.81/x
  3. Step 3: Cross multiply
    312,716.50x = 431,595.09 × 198,005.81
  4. Step 4: Simplify right side
    312,716.50x = 85,458,335,387.47
  5. Step 5: Solve for x
    x = 85,458,335,387.47/312,716.50
  6. Step 6: Final answer
    x = 273,277.35

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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.