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Finding the Fourth Proportional to 879.00, 1,325.11 and 819.54

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Solution

The fourth proportional to 879.00, 1,325.11 and 819.54 is: 1,235.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    879.00 : 1,325.11 = 819.54 : x
  2. Step 2: Convert to fraction form
    879.00/1,325.11 = 819.54/x
  3. Step 3: Cross multiply
    879.00x = 1,325.11 × 819.54
  4. Step 4: Simplify right side
    879.00x = 1,085,983.86
  5. Step 5: Solve for x
    x = 1,085,983.86/879.00
  6. Step 6: Final answer
    x = 1,235.47

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.