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Finding the Fourth Proportional to 312,758.28, 431,604.72 and 169,516.80

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Solution

The fourth proportional to 312,758.28, 431,604.72 and 169,516.80 is: 233,932.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,758.28 : 431,604.72 = 169,516.80 : x
  2. Step 2: Convert to fraction form
    312,758.28/431,604.72 = 169,516.80/x
  3. Step 3: Cross multiply
    312,758.28x = 431,604.72 × 169,516.80
  4. Step 4: Simplify right side
    312,758.28x = 73,164,250,999.30
  5. Step 5: Solve for x
    x = 73,164,250,999.30/312,758.28
  6. Step 6: Final answer
    x = 233,932.26

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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.