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Finding the Fourth Proportional to 394,683, 544,662.54 and 215,835

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Solution

The fourth proportional to 394,683, 544,662.54 and 215,835 is: 297,852.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,683 : 544,662.54 = 215,835 : x
  2. Step 2: Convert to fraction form
    394,683/544,662.54 = 215,835/x
  3. Step 3: Cross multiply
    394,683x = 544,662.54 × 215,835
  4. Step 4: Simplify right side
    394,683x = 117,557,239,320.90
  5. Step 5: Solve for x
    x = 117,557,239,320.90/394,683
  6. Step 6: Final answer
    x = 297,852.30

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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.