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Finding the Fourth Proportional to 879.21, 1,212.93 and 599.49

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Solution

The fourth proportional to 879.21, 1,212.93 and 599.49 is: 827.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    879.21 : 1,212.93 = 599.49 : x
  2. Step 2: Convert to fraction form
    879.21/1,212.93 = 599.49/x
  3. Step 3: Cross multiply
    879.21x = 1,212.93 × 599.49
  4. Step 4: Simplify right side
    879.21x = 727,139.41
  5. Step 5: Solve for x
    x = 727,139.41/879.21
  6. Step 6: Final answer
    x = 827.04

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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.