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Finding the Fourth Proportional to 394,660.84, 544,620.90 and 215,809

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Solution

The fourth proportional to 394,660.84, 544,620.90 and 215,809 is: 297,810.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,660.84 : 544,620.90 = 215,809 : x
  2. Step 2: Convert to fraction form
    394,660.84/544,620.90 = 215,809/x
  3. Step 3: Cross multiply
    394,660.84x = 544,620.90 × 215,809
  4. Step 4: Simplify right side
    394,660.84x = 117,534,091,808.10
  5. Step 5: Solve for x
    x = 117,534,091,808.10/394,660.84
  6. Step 6: Final answer
    x = 297,810.37

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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.