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Finding the Fourth Proportional to 678,853.66, 936,713.91 and 392,318.41

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Solution

The fourth proportional to 678,853.66, 936,713.91 and 392,318.41 is: 541,339.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,853.66 : 936,713.91 = 392,318.41 : x
  2. Step 2: Convert to fraction form
    678,853.66/936,713.91 = 392,318.41/x
  3. Step 3: Cross multiply
    678,853.66x = 936,713.91 × 392,318.41
  4. Step 4: Simplify right side
    678,853.66x = 367,490,111,796.08
  5. Step 5: Solve for x
    x = 367,490,111,796.08/678,853.66
  6. Step 6: Final answer
    x = 541,339.22

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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.