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Finding the Fourth Proportional to 2,170.36, 3,255.80 and 709.68

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Solution

The fourth proportional to 2,170.36, 3,255.80 and 709.68 is: 1,064.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,170.36 : 3,255.80 = 709.68 : x
  2. Step 2: Convert to fraction form
    2,170.36/3,255.80 = 709.68/x
  3. Step 3: Cross multiply
    2,170.36x = 3,255.80 × 709.68
  4. Step 4: Simplify right side
    2,170.36x = 2,310,576.14
  5. Step 5: Solve for x
    x = 2,310,576.14/2,170.36
  6. Step 6: Final answer
    x = 1,064.61

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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.