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Finding the Fourth Proportional to 394,212.12, 544,012.80 and 215,364.12

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Solution

The fourth proportional to 394,212.12, 544,012.80 and 215,364.12 is: 297,202.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,212.12 : 544,012.80 = 215,364.12 : x
  2. Step 2: Convert to fraction form
    394,212.12/544,012.80 = 215,364.12/x
  3. Step 3: Cross multiply
    394,212.12x = 544,012.80 × 215,364.12
  4. Step 4: Simplify right side
    394,212.12x = 117,160,837,940.74
  5. Step 5: Solve for x
    x = 117,160,837,940.74/394,212.12
  6. Step 6: Final answer
    x = 297,202.53

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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.