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Finding the Fourth Proportional to 1,192,605.74, 1,789,738.05 and 770,835.50

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Solution

The fourth proportional to 1,192,605.74, 1,789,738.05 and 770,835.50 is: 1,156,789.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,192,605.74 : 1,789,738.05 = 770,835.50 : x
  2. Step 2: Convert to fraction form
    1,192,605.74/1,789,738.05 = 770,835.50/x
  3. Step 3: Cross multiply
    1,192,605.74x = 1,789,738.05 × 770,835.50
  4. Step 4: Simplify right side
    1,192,605.74x = 1,379,593,624,640.78
  5. Step 5: Solve for x
    x = 1,379,593,624,640.78/1,192,605.74
  6. Step 6: Final answer
    x = 1,156,789.35

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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.