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Finding the Fourth Proportional to 612,778.45, 919,219.12 and 186,317.98

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Solution

The fourth proportional to 612,778.45, 919,219.12 and 186,317.98 is: 279,492.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,778.45 : 919,219.12 = 186,317.98 : x
  2. Step 2: Convert to fraction form
    612,778.45/919,219.12 = 186,317.98/x
  3. Step 3: Cross multiply
    612,778.45x = 919,219.12 × 186,317.98
  4. Step 4: Simplify right side
    612,778.45x = 171,267,047,124.82
  5. Step 5: Solve for x
    x = 171,267,047,124.82/612,778.45
  6. Step 6: Final answer
    x = 279,492.61

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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.