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Finding the Fourth Proportional to 397,717.51, 548,850.25 and 218,869.51

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Solution

The fourth proportional to 397,717.51, 548,850.25 and 218,869.51 is: 302,039.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,717.51 : 548,850.25 = 218,869.51 : x
  2. Step 2: Convert to fraction form
    397,717.51/548,850.25 = 218,869.51/x
  3. Step 3: Cross multiply
    397,717.51x = 548,850.25 × 218,869.51
  4. Step 4: Simplify right side
    397,717.51x = 120,126,584,186.53
  5. Step 5: Solve for x
    x = 120,126,584,186.53/397,717.51
  6. Step 6: Final answer
    x = 302,039.97

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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.