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Finding the Fourth Proportional to 2,685.54, 3,706.34 and 1,789.22

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Solution

The fourth proportional to 2,685.54, 3,706.34 and 1,789.22 is: 2,469.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,685.54 : 3,706.34 = 1,789.22 : x
  2. Step 2: Convert to fraction form
    2,685.54/3,706.34 = 1,789.22/x
  3. Step 3: Cross multiply
    2,685.54x = 3,706.34 × 1,789.22
  4. Step 4: Simplify right side
    2,685.54x = 6,631,457.65
  5. Step 5: Solve for x
    x = 6,631,457.65/2,685.54
  6. Step 6: Final answer
    x = 2,469.32

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1.5x scale

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.