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Finding the Fourth Proportional to 312,783.62, 431,629.83 and 169,540.59

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Solution

The fourth proportional to 312,783.62, 431,629.83 and 169,540.59 is: 233,959.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,783.62 : 431,629.83 = 169,540.59 : x
  2. Step 2: Convert to fraction form
    312,783.62/431,629.83 = 169,540.59/x
  3. Step 3: Cross multiply
    312,783.62x = 431,629.83 × 169,540.59
  4. Step 4: Simplify right side
    312,783.62x = 73,178,776,039.80
  5. Step 5: Solve for x
    x = 73,178,776,039.80/312,783.62
  6. Step 6: Final answer
    x = 233,959.74

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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.