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Finding the Fourth Proportional to 2,170.38, 3,255.84 and 783.54

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Solution

The fourth proportional to 2,170.38, 3,255.84 and 783.54 is: 1,175.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,170.38 : 3,255.84 = 783.54 : x
  2. Step 2: Convert to fraction form
    2,170.38/3,255.84 = 783.54/x
  3. Step 3: Cross multiply
    2,170.38x = 3,255.84 × 783.54
  4. Step 4: Simplify right side
    2,170.38x = 2,551,080.87
  5. Step 5: Solve for x
    x = 2,551,080.87/2,170.38
  6. Step 6: Final answer
    x = 1,175.41

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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.