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Finding the Fourth Proportional to 312,707.43, 431,536.61 and 169,467.47

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Solution

The fourth proportional to 312,707.43, 431,536.61 and 169,467.47 is: 233,865.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,707.43 : 431,536.61 = 169,467.47 : x
  2. Step 2: Convert to fraction form
    312,707.43/431,536.61 = 169,467.47/x
  3. Step 3: Cross multiply
    312,707.43x = 431,536.61 × 169,467.47
  4. Step 4: Simplify right side
    312,707.43x = 73,131,415,351.39
  5. Step 5: Solve for x
    x = 73,131,415,351.39/312,707.43
  6. Step 6: Final answer
    x = 233,865.30

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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.