Home / 685,838.19-946,918.85-428,107.53

Finding the Fourth Proportional to 685,838.19, 946,918.85 and 428,107.53

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Solution

The fourth proportional to 685,838.19, 946,918.85 and 428,107.53 is: 591,076.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,838.19 : 946,918.85 = 428,107.53 : x
  2. Step 2: Convert to fraction form
    685,838.19/946,918.85 = 428,107.53/x
  3. Step 3: Cross multiply
    685,838.19x = 946,918.85 × 428,107.53
  4. Step 4: Simplify right side
    685,838.19x = 405,383,089,983.94
  5. Step 5: Solve for x
    x = 405,383,089,983.94/685,838.19
  6. Step 6: Final answer
    x = 591,076.87

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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.