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Finding the Fourth Proportional to 627,690.70, 866,228.07 and 355,786.30

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Solution

The fourth proportional to 627,690.70, 866,228.07 and 355,786.30 is: 490,993.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,690.70 : 866,228.07 = 355,786.30 : x
  2. Step 2: Convert to fraction form
    627,690.70/866,228.07 = 355,786.30/x
  3. Step 3: Cross multiply
    627,690.70x = 866,228.07 × 355,786.30
  4. Step 4: Simplify right side
    627,690.70x = 308,192,079,981.44
  5. Step 5: Solve for x
    x = 308,192,079,981.44/627,690.70
  6. Step 6: Final answer
    x = 490,993.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.