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Finding the Fourth Proportional to 850.21, 1,173.72 and 727.19

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Solution

The fourth proportional to 850.21, 1,173.72 and 727.19 is: 1,003.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.21 : 1,173.72 = 727.19 : x
  2. Step 2: Convert to fraction form
    850.21/1,173.72 = 727.19/x
  3. Step 3: Cross multiply
    850.21x = 1,173.72 × 727.19
  4. Step 4: Simplify right side
    850.21x = 853,518.71
  5. Step 5: Solve for x
    x = 853,518.71/850.21
  6. Step 6: Final answer
    x = 1,003.89

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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.