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Finding the Fourth Proportional to 685,012.92, 945,316.46 and 383,206.92

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Solution

The fourth proportional to 685,012.92, 945,316.46 and 383,206.92 is: 528,824.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,012.92 : 945,316.46 = 383,206.92 : x
  2. Step 2: Convert to fraction form
    685,012.92/945,316.46 = 383,206.92/x
  3. Step 3: Cross multiply
    685,012.92x = 945,316.46 × 383,206.92
  4. Step 4: Simplify right side
    685,012.92x = 362,251,809,061.90
  5. Step 5: Solve for x
    x = 362,251,809,061.90/685,012.92
  6. Step 6: Final answer
    x = 528,824.78

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Double scale
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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.