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Finding the Fourth Proportional to 678,609.51, 936,596.34 and 392,295.57

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Solution

The fourth proportional to 678,609.51, 936,596.34 and 392,295.57 is: 541,434.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,609.51 : 936,596.34 = 392,295.57 : x
  2. Step 2: Convert to fraction form
    678,609.51/936,596.34 = 392,295.57/x
  3. Step 3: Cross multiply
    678,609.51x = 936,596.34 × 392,295.57
  4. Step 4: Simplify right side
    678,609.51x = 367,422,595,060.21
  5. Step 5: Solve for x
    x = 367,422,595,060.21/678,609.51
  6. Step 6: Final answer
    x = 541,434.49

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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.