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Finding the Fourth Proportional to 2,189, 3,284.70 and 2,172.68

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Solution

The fourth proportional to 2,189, 3,284.70 and 2,172.68 is: 3,260.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,189 : 3,284.70 = 2,172.68 : x
  2. Step 2: Convert to fraction form
    2,189/3,284.70 = 2,172.68/x
  3. Step 3: Cross multiply
    2,189x = 3,284.70 × 2,172.68
  4. Step 4: Simplify right side
    2,189x = 7,136,602.00
  5. Step 5: Solve for x
    x = 7,136,602.00/2,189
  6. Step 6: Final answer
    x = 3,260.21

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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.