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Finding the Fourth Proportional to 421,976.91, 632,965.38 and 126,488.91

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Solution

The fourth proportional to 421,976.91, 632,965.38 and 126,488.91 is: 189,733.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,976.91 : 632,965.38 = 126,488.91 : x
  2. Step 2: Convert to fraction form
    421,976.91/632,965.38 = 126,488.91/x
  3. Step 3: Cross multiply
    421,976.91x = 632,965.38 × 126,488.91
  4. Step 4: Simplify right side
    421,976.91x = 80,063,100,983.94
  5. Step 5: Solve for x
    x = 80,063,100,983.94/421,976.91
  6. Step 6: Final answer
    x = 189,733.37

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.