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Finding the Fourth Proportional to 666,668.72, 1,000,107.04 and 217,285.32

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Solution

The fourth proportional to 666,668.72, 1,000,107.04 and 217,285.32 is: 325,961.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,668.72 : 1,000,107.04 = 217,285.32 : x
  2. Step 2: Convert to fraction form
    666,668.72/1,000,107.04 = 217,285.32/x
  3. Step 3: Cross multiply
    666,668.72x = 1,000,107.04 × 217,285.32
  4. Step 4: Simplify right side
    666,668.72x = 217,308,578,220.65
  5. Step 5: Solve for x
    x = 217,308,578,220.65/666,668.72
  6. Step 6: Final answer
    x = 325,961.86

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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.