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Finding the Fourth Proportional to 1,993,300.70, 2,989,951.05 and 1,981,490.90

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Solution

The fourth proportional to 1,993,300.70, 2,989,951.05 and 1,981,490.90 is: 2,972,236.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,993,300.70 : 2,989,951.05 = 1,981,490.90 : x
  2. Step 2: Convert to fraction form
    1,993,300.70/2,989,951.05 = 1,981,490.90/x
  3. Step 3: Cross multiply
    1,993,300.70x = 2,989,951.05 × 1,981,490.90
  4. Step 4: Simplify right side
    1,993,300.70x = 5,924,560,797,020.44
  5. Step 5: Solve for x
    x = 5,924,560,797,020.44/1,993,300.70
  6. Step 6: Final answer
    x = 2,972,236.35

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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.