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Finding the Fourth Proportional to 646,647.76, 892,418.76 and 392,009.68

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Solution

The fourth proportional to 646,647.76, 892,418.76 and 392,009.68 is: 541,000.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,647.76 : 892,418.76 = 392,009.68 : x
  2. Step 2: Convert to fraction form
    646,647.76/892,418.76 = 392,009.68/x
  3. Step 3: Cross multiply
    646,647.76x = 892,418.76 × 392,009.68
  4. Step 4: Simplify right side
    646,647.76x = 349,836,792,533.60
  5. Step 5: Solve for x
    x = 349,836,792,533.60/646,647.76
  6. Step 6: Final answer
    x = 541,000.55

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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.