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Finding the Fourth Proportional to 312,729.92, 431,568.77 and 169,489.92

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Solution

The fourth proportional to 312,729.92, 431,568.77 and 169,489.92 is: 233,896.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,729.92 : 431,568.77 = 169,489.92 : x
  2. Step 2: Convert to fraction form
    312,729.92/431,568.77 = 169,489.92/x
  3. Step 3: Cross multiply
    312,729.92x = 431,568.77 × 169,489.92
  4. Step 4: Simplify right side
    312,729.92x = 73,146,555,454.35
  5. Step 5: Solve for x
    x = 73,146,555,454.35/312,729.92
  6. Step 6: Final answer
    x = 233,896.89

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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.