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Finding the Fourth Proportional to 666,146.43, 999,274.32 and 216,747.09

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Solution

The fourth proportional to 666,146.43, 999,274.32 and 216,747.09 is: 325,138.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,146.43 : 999,274.32 = 216,747.09 : x
  2. Step 2: Convert to fraction form
    666,146.43/999,274.32 = 216,747.09/x
  3. Step 3: Cross multiply
    666,146.43x = 999,274.32 × 216,747.09
  4. Step 4: Simplify right side
    666,146.43x = 216,589,800,971.73
  5. Step 5: Solve for x
    x = 216,589,800,971.73/666,146.43
  6. Step 6: Final answer
    x = 325,138.42

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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.