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Finding the Fourth Proportional to 850.77, 1,174.91 and 849.15

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Solution

The fourth proportional to 850.77, 1,174.91 and 849.15 is: 1,172.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.77 : 1,174.91 = 849.15 : x
  2. Step 2: Convert to fraction form
    850.77/1,174.91 = 849.15/x
  3. Step 3: Cross multiply
    850.77x = 1,174.91 × 849.15
  4. Step 4: Simplify right side
    850.77x = 997,670.58
  5. Step 5: Solve for x
    x = 997,670.58/850.77
  6. Step 6: Final answer
    x = 1,172.67

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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.