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Finding the Fourth Proportional to 394,243.28, 544,055.94 and 212,955.21

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Solution

The fourth proportional to 394,243.28, 544,055.94 and 212,955.21 is: 293,878.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,243.28 : 544,055.94 = 212,955.21 : x
  2. Step 2: Convert to fraction form
    394,243.28/544,055.94 = 212,955.21/x
  3. Step 3: Cross multiply
    394,243.28x = 544,055.94 × 212,955.21
  4. Step 4: Simplify right side
    394,243.28x = 115,859,544,693.45
  5. Step 5: Solve for x
    x = 115,859,544,693.45/394,243.28
  6. Step 6: Final answer
    x = 293,878.30

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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.