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Finding the Fourth Proportional to 3,175.78, 4,763.73 and 867.28

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Solution

The fourth proportional to 3,175.78, 4,763.73 and 867.28 is: 1,300.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,175.78 : 4,763.73 = 867.28 : x
  2. Step 2: Convert to fraction form
    3,175.78/4,763.73 = 867.28/x
  3. Step 3: Cross multiply
    3,175.78x = 4,763.73 × 867.28
  4. Step 4: Simplify right side
    3,175.78x = 4,131,487.75
  5. Step 5: Solve for x
    x = 4,131,487.75/3,175.78
  6. Step 6: Final answer
    x = 1,300.94

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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.