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Finding the Fourth Proportional to 394,674, 544,650.12 and 215,826

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Solution

The fourth proportional to 394,674, 544,650.12 and 215,826 is: 297,839.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,674 : 544,650.12 = 215,826 : x
  2. Step 2: Convert to fraction form
    394,674/544,650.12 = 215,826/x
  3. Step 3: Cross multiply
    394,674x = 544,650.12 × 215,826
  4. Step 4: Simplify right side
    394,674x = 117,549,656,799.12
  5. Step 5: Solve for x
    x = 117,549,656,799.12/394,674
  6. Step 6: Final answer
    x = 297,839.88

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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.