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Finding the Fourth Proportional to 263,136.70, 394,705.05 and 210,648.70

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Solution

The fourth proportional to 263,136.70, 394,705.05 and 210,648.70 is: 315,973.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,136.70 : 394,705.05 = 210,648.70 : x
  2. Step 2: Convert to fraction form
    263,136.70/394,705.05 = 210,648.70/x
  3. Step 3: Cross multiply
    263,136.70x = 394,705.05 × 210,648.70
  4. Step 4: Simplify right side
    263,136.70x = 83,144,105,665.94
  5. Step 5: Solve for x
    x = 83,144,105,665.94/263,136.70
  6. Step 6: Final answer
    x = 315,973.05

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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.