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Finding the Fourth Proportional to 850.37, 1,274.48 and 485.36

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Solution

The fourth proportional to 850.37, 1,274.48 and 485.36 is: 727.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.37 : 1,274.48 = 485.36 : x
  2. Step 2: Convert to fraction form
    850.37/1,274.48 = 485.36/x
  3. Step 3: Cross multiply
    850.37x = 1,274.48 × 485.36
  4. Step 4: Simplify right side
    850.37x = 618,579.19
  5. Step 5: Solve for x
    x = 618,579.19/850.37
  6. Step 6: Final answer
    x = 727.43

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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.