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Finding the Fourth Proportional to 394,667.84, 544,630.56 and 215,816

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Solution

The fourth proportional to 394,667.84, 544,630.56 and 215,816 is: 297,820.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,667.84 : 544,630.56 = 215,816 : x
  2. Step 2: Convert to fraction form
    394,667.84/544,630.56 = 215,816/x
  3. Step 3: Cross multiply
    394,667.84x = 544,630.56 × 215,816
  4. Step 4: Simplify right side
    394,667.84x = 117,539,988,936.96
  5. Step 5: Solve for x
    x = 117,539,988,936.96/394,667.84
  6. Step 6: Final answer
    x = 297,820.03

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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.