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Finding the Fourth Proportional to 394,010.21, 543,731.33 and 215,162.21

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Solution

The fourth proportional to 394,010.21, 543,731.33 and 215,162.21 is: 296,922.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,010.21 : 543,731.33 = 215,162.21 : x
  2. Step 2: Convert to fraction form
    394,010.21/543,731.33 = 215,162.21/x
  3. Step 3: Cross multiply
    394,010.21x = 543,731.33 × 215,162.21
  4. Step 4: Simplify right side
    394,010.21x = 116,990,433,533.23
  5. Step 5: Solve for x
    x = 116,990,433,533.23/394,010.21
  6. Step 6: Final answer
    x = 296,922.34

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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.