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Finding the Fourth Proportional to 666,879, 1,000,320.12 and 168,243

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Solution

The fourth proportional to 666,879, 1,000,320.12 and 168,243 is: 252,364.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,879 : 1,000,320.12 = 168,243 : x
  2. Step 2: Convert to fraction form
    666,879/1,000,320.12 = 168,243/x
  3. Step 3: Cross multiply
    666,879x = 1,000,320.12 × 168,243
  4. Step 4: Simplify right side
    666,879x = 168,296,857,949.16
  5. Step 5: Solve for x
    x = 168,296,857,949.16/666,879
  6. Step 6: Final answer
    x = 252,364.91

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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.