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Finding the Fourth Proportional to 612,786.90, 919,179.81 and 186,326.22

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Solution

The fourth proportional to 612,786.90, 919,179.81 and 186,326.22 is: 279,489.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,786.90 : 919,179.81 = 186,326.22 : x
  2. Step 2: Convert to fraction form
    612,786.90/919,179.81 = 186,326.22/x
  3. Step 3: Cross multiply
    612,786.90x = 919,179.81 × 186,326.22
  4. Step 4: Simplify right side
    612,786.90x = 171,267,299,497.62
  5. Step 5: Solve for x
    x = 171,267,299,497.62/612,786.90
  6. Step 6: Final answer
    x = 279,489.17

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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.