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Finding the Fourth Proportional to 408,366.83, 612,018.05 and 208,518.77

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Solution

The fourth proportional to 408,366.83, 612,018.05 and 208,518.77 is: 312,506.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,366.83 : 612,018.05 = 208,518.77 : x
  2. Step 2: Convert to fraction form
    408,366.83/612,018.05 = 208,518.77/x
  3. Step 3: Cross multiply
    408,366.83x = 612,018.05 × 208,518.77
  4. Step 4: Simplify right side
    408,366.83x = 127,617,251,491.25
  5. Step 5: Solve for x
    x = 127,617,251,491.25/408,366.83
  6. Step 6: Final answer
    x = 312,506.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.