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Finding the Fourth Proportional to 305,161.56, 421,120.90 and 169,195.52

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Solution

The fourth proportional to 305,161.56, 421,120.90 and 169,195.52 is: 233,488.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,161.56 : 421,120.90 = 169,195.52 : x
  2. Step 2: Convert to fraction form
    305,161.56/421,120.90 = 169,195.52/x
  3. Step 3: Cross multiply
    305,161.56x = 421,120.90 × 169,195.52
  4. Step 4: Simplify right side
    305,161.56x = 71,251,769,658.37
  5. Step 5: Solve for x
    x = 71,251,769,658.37/305,161.56
  6. Step 6: Final answer
    x = 233,488.68

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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.