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Finding the Fourth Proportional to 312,757.78, 431,601.06 and 176,786.94

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Solution

The fourth proportional to 312,757.78, 431,601.06 and 176,786.94 is: 243,963.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,757.78 : 431,601.06 = 176,786.94 : x
  2. Step 2: Convert to fraction form
    312,757.78/431,601.06 = 176,786.94/x
  3. Step 3: Cross multiply
    312,757.78x = 431,601.06 × 176,786.94
  4. Step 4: Simplify right side
    312,757.78x = 76,301,430,698.16
  5. Step 5: Solve for x
    x = 76,301,430,698.16/312,757.78
  6. Step 6: Final answer
    x = 243,963.33

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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.