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Finding the Fourth Proportional to 312,736.28, 431,574.36 and 169,494.80

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Solution

The fourth proportional to 312,736.28, 431,574.36 and 169,494.80 is: 233,901.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,736.28 : 431,574.36 = 169,494.80 : x
  2. Step 2: Convert to fraction form
    312,736.28/431,574.36 = 169,494.80/x
  3. Step 3: Cross multiply
    312,736.28x = 431,574.36 × 169,494.80
  4. Step 4: Simplify right side
    312,736.28x = 73,149,609,833.33
  5. Step 5: Solve for x
    x = 73,149,609,833.33/312,736.28
  6. Step 6: Final answer
    x = 233,901.90

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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.