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Finding the Fourth Proportional to 394,164.25, 543,946.67 and 215,316.25

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Solution

The fourth proportional to 394,164.25, 543,946.67 and 215,316.25 is: 297,136.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,164.25 : 543,946.67 = 215,316.25 : x
  2. Step 2: Convert to fraction form
    394,164.25/543,946.67 = 215,316.25/x
  3. Step 3: Cross multiply
    394,164.25x = 543,946.67 × 215,316.25
  4. Step 4: Simplify right side
    394,164.25x = 117,120,556,107.81
  5. Step 5: Solve for x
    x = 117,120,556,107.81/394,164.25
  6. Step 6: Final answer
    x = 297,136.43

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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.