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Finding the Fourth Proportional to 879.55, 1,211.12 and 834.37

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Solution

The fourth proportional to 879.55, 1,211.12 and 834.37 is: 1,148.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    879.55 : 1,211.12 = 834.37 : x
  2. Step 2: Convert to fraction form
    879.55/1,211.12 = 834.37/x
  3. Step 3: Cross multiply
    879.55x = 1,211.12 × 834.37
  4. Step 4: Simplify right side
    879.55x = 1,010,518.12
  5. Step 5: Solve for x
    x = 1,010,518.12/879.55
  6. Step 6: Final answer
    x = 1,148.91

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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.