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Finding the Fourth Proportional to 1,321.80, 1,824.32 and 850.28

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Solution

The fourth proportional to 1,321.80, 1,824.32 and 850.28 is: 1,173.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321.80 : 1,824.32 = 850.28 : x
  2. Step 2: Convert to fraction form
    1,321.80/1,824.32 = 850.28/x
  3. Step 3: Cross multiply
    1,321.80x = 1,824.32 × 850.28
  4. Step 4: Simplify right side
    1,321.80x = 1,551,182.81
  5. Step 5: Solve for x
    x = 1,551,182.81/1,321.80
  6. Step 6: Final answer
    x = 1,173.54

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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.