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Finding the Fourth Proportional to 618,432.29, 853,059.33 and 408,879.44

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Solution

The fourth proportional to 618,432.29, 853,059.33 and 408,879.44 is: 564,004.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,432.29 : 853,059.33 = 408,879.44 : x
  2. Step 2: Convert to fraction form
    618,432.29/853,059.33 = 408,879.44/x
  3. Step 3: Cross multiply
    618,432.29x = 853,059.33 × 408,879.44
  4. Step 4: Simplify right side
    618,432.29x = 348,798,421,137.18
  5. Step 5: Solve for x
    x = 348,798,421,137.18/618,432.29
  6. Step 6: Final answer
    x = 564,004.22

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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.