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Finding the Fourth Proportional to 685,133.34, 945,485.86 and 379,230.78

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Solution

The fourth proportional to 685,133.34, 945,485.86 and 379,230.78 is: 523,339.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,133.34 : 945,485.86 = 379,230.78 : x
  2. Step 2: Convert to fraction form
    685,133.34/945,485.86 = 379,230.78/x
  3. Step 3: Cross multiply
    685,133.34x = 945,485.86 × 379,230.78
  4. Step 4: Simplify right side
    685,133.34x = 358,557,340,166.77
  5. Step 5: Solve for x
    x = 358,557,340,166.77/685,133.34
  6. Step 6: Final answer
    x = 523,339.50

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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.