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Finding the Fourth Proportional to 312,627.90, 431,188.49 and 269,094.54

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Solution

The fourth proportional to 312,627.90, 431,188.49 and 269,094.54 is: 371,145.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,627.90 : 431,188.49 = 269,094.54 : x
  2. Step 2: Convert to fraction form
    312,627.90/431,188.49 = 269,094.54/x
  3. Step 3: Cross multiply
    312,627.90x = 431,188.49 × 269,094.54
  4. Step 4: Simplify right side
    312,627.90x = 116,030,469,042.58
  5. Step 5: Solve for x
    x = 116,030,469,042.58/312,627.90
  6. Step 6: Final answer
    x = 371,145.60

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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.