Home / 1,212.30-1,671.03-949.86

Finding the Fourth Proportional to 1,212.30, 1,671.03 and 949.86

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Solution

The fourth proportional to 1,212.30, 1,671.03 and 949.86 is: 1,309.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212.30 : 1,671.03 = 949.86 : x
  2. Step 2: Convert to fraction form
    1,212.30/1,671.03 = 949.86/x
  3. Step 3: Cross multiply
    1,212.30x = 1,671.03 × 949.86
  4. Step 4: Simplify right side
    1,212.30x = 1,587,244.56
  5. Step 5: Solve for x
    x = 1,587,244.56/1,212.30
  6. Step 6: Final answer
    x = 1,309.28

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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.