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Finding the Fourth Proportional to 394,566, 544,503 and 215,718

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Solution

The fourth proportional to 394,566, 544,503 and 215,718 is: 297,691.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,566 : 544,503 = 215,718 : x
  2. Step 2: Convert to fraction form
    394,566/544,503 = 215,718/x
  3. Step 3: Cross multiply
    394,566x = 544,503 × 215,718
  4. Step 4: Simplify right side
    394,566x = 117,459,098,154
  5. Step 5: Solve for x
    x = 117,459,098,154/394,566
  6. Step 6: Final answer
    x = 297,691.89

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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.