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Finding the Fourth Proportional to 3,855.39, 5,782.95 and 1,222.89

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Solution

The fourth proportional to 3,855.39, 5,782.95 and 1,222.89 is: 1,834.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.39 : 5,782.95 = 1,222.89 : x
  2. Step 2: Convert to fraction form
    3,855.39/5,782.95 = 1,222.89/x
  3. Step 3: Cross multiply
    3,855.39x = 5,782.95 × 1,222.89
  4. Step 4: Simplify right side
    3,855.39x = 7,071,911.73
  5. Step 5: Solve for x
    x = 7,071,911.73/3,855.39
  6. Step 6: Final answer
    x = 1,834.29

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1.5x scale

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.