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Finding the Fourth Proportional to 936,879, 1,405,108.30 and 430,954.11

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Solution

The fourth proportional to 936,879, 1,405,108.30 and 430,954.11 is: 646,334.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    936,879 : 1,405,108.30 = 430,954.11 : x
  2. Step 2: Convert to fraction form
    936,879/1,405,108.30 = 430,954.11/x
  3. Step 3: Cross multiply
    936,879x = 1,405,108.30 × 430,954.11
  4. Step 4: Simplify right side
    936,879x = 605,537,196,880.11
  5. Step 5: Solve for x
    x = 605,537,196,880.11/936,879
  6. Step 6: Final answer
    x = 646,334.48

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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.