Home / 312,891.22-431,717.55-211,105.51

Finding the Fourth Proportional to 312,891.22, 431,717.55 and 211,105.51

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Solution

The fourth proportional to 312,891.22, 431,717.55 and 211,105.51 is: 291,276.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,891.22 : 431,717.55 = 211,105.51 : x
  2. Step 2: Convert to fraction form
    312,891.22/431,717.55 = 211,105.51/x
  3. Step 3: Cross multiply
    312,891.22x = 431,717.55 × 211,105.51
  4. Step 4: Simplify right side
    312,891.22x = 91,137,953,568.70
  5. Step 5: Solve for x
    x = 91,137,953,568.70/312,891.22
  6. Step 6: Final answer
    x = 291,276.80

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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.