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Finding the Fourth Proportional to 371,081.43, 512,076.66 and 209,939.22

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Solution

The fourth proportional to 371,081.43, 512,076.66 and 209,939.22 is: 289,707.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,081.43 : 512,076.66 = 209,939.22 : x
  2. Step 2: Convert to fraction form
    371,081.43/512,076.66 = 209,939.22/x
  3. Step 3: Cross multiply
    371,081.43x = 512,076.66 × 209,939.22
  4. Step 4: Simplify right side
    371,081.43x = 107,504,974,580.61
  5. Step 5: Solve for x
    x = 107,504,974,580.61/371,081.43
  6. Step 6: Final answer
    x = 289,707.23

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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.