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Finding the Fourth Proportional to 678,832.32, 936,803.60 and 392,364.48

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Solution

The fourth proportional to 678,832.32, 936,803.60 and 392,364.48 is: 541,471.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,832.32 : 936,803.60 = 392,364.48 : x
  2. Step 2: Convert to fraction form
    678,832.32/936,803.60 = 392,364.48/x
  3. Step 3: Cross multiply
    678,832.32x = 936,803.60 × 392,364.48
  4. Step 4: Simplify right side
    678,832.32x = 367,568,457,376.13
  5. Step 5: Solve for x
    x = 367,568,457,376.13/678,832.32
  6. Step 6: Final answer
    x = 541,471.65

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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.