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Finding the Fourth Proportional to 394,278.54, 544,103.88 and 212,990.40

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Solution

The fourth proportional to 394,278.54, 544,103.88 and 212,990.40 is: 293,926.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,278.54 : 544,103.88 = 212,990.40 : x
  2. Step 2: Convert to fraction form
    394,278.54/544,103.88 = 212,990.40/x
  3. Step 3: Cross multiply
    394,278.54x = 544,103.88 × 212,990.40
  4. Step 4: Simplify right side
    394,278.54x = 115,888,903,042.75
  5. Step 5: Solve for x
    x = 115,888,903,042.75/394,278.54
  6. Step 6: Final answer
    x = 293,926.48

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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.