Home / 399,936.83-551,912.78-218,648.71

Finding the Fourth Proportional to 399,936.83, 551,912.78 and 218,648.71

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Solution

The fourth proportional to 399,936.83, 551,912.78 and 218,648.71 is: 301,735.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,936.83 : 551,912.78 = 218,648.71 : x
  2. Step 2: Convert to fraction form
    399,936.83/551,912.78 = 218,648.71/x
  3. Step 3: Cross multiply
    399,936.83x = 551,912.78 × 218,648.71
  4. Step 4: Simplify right side
    399,936.83x = 120,675,017,379.51
  5. Step 5: Solve for x
    x = 120,675,017,379.51/399,936.83
  6. Step 6: Final answer
    x = 301,735.20

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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.