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Finding the Fourth Proportional to 654,636.60, 981,954.90 and 211,404.60

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Solution

The fourth proportional to 654,636.60, 981,954.90 and 211,404.60 is: 317,106.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,636.60 : 981,954.90 = 211,404.60 : x
  2. Step 2: Convert to fraction form
    654,636.60/981,954.90 = 211,404.60/x
  3. Step 3: Cross multiply
    654,636.60x = 981,954.90 × 211,404.60
  4. Step 4: Simplify right side
    654,636.60x = 207,589,782,852.54
  5. Step 5: Solve for x
    x = 207,589,782,852.54/654,636.60
  6. Step 6: Final answer
    x = 317,106.90

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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.