Home / 399,936.33-551,912.09-218,648.21

Finding the Fourth Proportional to 399,936.33, 551,912.09 and 218,648.21

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Solution

The fourth proportional to 399,936.33, 551,912.09 and 218,648.21 is: 301,734.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,936.33 : 551,912.09 = 218,648.21 : x
  2. Step 2: Convert to fraction form
    399,936.33/551,912.09 = 218,648.21/x
  3. Step 3: Cross multiply
    399,936.33x = 551,912.09 × 218,648.21
  4. Step 4: Simplify right side
    399,936.33x = 120,674,589,343.40
  5. Step 5: Solve for x
    x = 120,674,589,343.40/399,936.33
  6. Step 6: Final answer
    x = 301,734.50

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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.