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Finding the Fourth Proportional to 879.30, 1,212.98 and 548.01

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Solution

The fourth proportional to 879.30, 1,212.98 and 548.01 is: 755.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    879.30 : 1,212.98 = 548.01 : x
  2. Step 2: Convert to fraction form
    879.30/1,212.98 = 548.01/x
  3. Step 3: Cross multiply
    879.30x = 1,212.98 × 548.01
  4. Step 4: Simplify right side
    879.30x = 664,722.43
  5. Step 5: Solve for x
    x = 664,722.43/879.30
  6. Step 6: Final answer
    x = 755.97

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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.