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Finding the Fourth Proportional to 850.44, 1,275.03 and 485.46

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Solution

The fourth proportional to 850.44, 1,275.03 and 485.46 is: 727.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.44 : 1,275.03 = 485.46 : x
  2. Step 2: Convert to fraction form
    850.44/1,275.03 = 485.46/x
  3. Step 3: Cross multiply
    850.44x = 1,275.03 × 485.46
  4. Step 4: Simplify right side
    850.44x = 618,976.06
  5. Step 5: Solve for x
    x = 618,976.06/850.44
  6. Step 6: Final answer
    x = 727.83

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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.