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Finding the Fourth Proportional to 312,639.41, 431,447.34 and 174,833.80

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Solution

The fourth proportional to 312,639.41, 431,447.34 and 174,833.80 is: 241,273.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,639.41 : 431,447.34 = 174,833.80 : x
  2. Step 2: Convert to fraction form
    312,639.41/431,447.34 = 174,833.80/x
  3. Step 3: Cross multiply
    312,639.41x = 431,447.34 × 174,833.80
  4. Step 4: Simplify right side
    312,639.41x = 75,431,577,952.09
  5. Step 5: Solve for x
    x = 75,431,577,952.09/312,639.41
  6. Step 6: Final answer
    x = 241,273.41

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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.