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Finding the Fourth Proportional to 312,761.37, 431,611.46 and 169,521.27

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Solution

The fourth proportional to 312,761.37, 431,611.46 and 169,521.27 is: 233,939.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,761.37 : 431,611.46 = 169,521.27 : x
  2. Step 2: Convert to fraction form
    312,761.37/431,611.46 = 169,521.27/x
  3. Step 3: Cross multiply
    312,761.37x = 431,611.46 × 169,521.27
  4. Step 4: Simplify right side
    312,761.37x = 73,167,321,998.15
  5. Step 5: Solve for x
    x = 73,167,321,998.15/312,761.37
  6. Step 6: Final answer
    x = 233,939.77

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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.