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Finding the Fourth Proportional to 312,626.90, 431,187.11 and 269,093.54

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Solution

The fourth proportional to 312,626.90, 431,187.11 and 269,093.54 is: 371,144.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,626.90 : 431,187.11 = 269,093.54 : x
  2. Step 2: Convert to fraction form
    312,626.90/431,187.11 = 269,093.54/x
  3. Step 3: Cross multiply
    312,626.90x = 431,187.11 × 269,093.54
  4. Step 4: Simplify right side
    312,626.90x = 116,029,663,676.33
  5. Step 5: Solve for x
    x = 116,029,663,676.33/312,626.90
  6. Step 6: Final answer
    x = 371,144.22

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1.5x scale

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.