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Finding the Fourth Proportional to 666,486.90, 999,850.68 and 217,167.84

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Solution

The fourth proportional to 666,486.90, 999,850.68 and 217,167.84 is: 325,790.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,486.90 : 999,850.68 = 217,167.84 : x
  2. Step 2: Convert to fraction form
    666,486.90/999,850.68 = 217,167.84/x
  3. Step 3: Cross multiply
    666,486.90x = 999,850.68 × 217,167.84
  4. Step 4: Simplify right side
    666,486.90x = 217,135,412,498.13
  5. Step 5: Solve for x
    x = 217,135,412,498.13/666,486.90
  6. Step 6: Final answer
    x = 325,790.97

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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.