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Finding the Fourth Proportional to 666,321.51, 999,489.96 and 186,520.74

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Solution

The fourth proportional to 666,321.51, 999,489.96 and 186,520.74 is: 279,783.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,321.51 : 999,489.96 = 186,520.74 : x
  2. Step 2: Convert to fraction form
    666,321.51/999,489.96 = 186,520.74/x
  3. Step 3: Cross multiply
    666,321.51x = 999,489.96 × 186,520.74
  4. Step 4: Simplify right side
    666,321.51x = 186,425,606,961.77
  5. Step 5: Solve for x
    x = 186,425,606,961.77/666,321.51
  6. Step 6: Final answer
    x = 279,783.26

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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.