Home / 1,206.44-1,667.32-911.60

Finding the Fourth Proportional to 1,206.44, 1,667.32 and 911.60

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Solution

The fourth proportional to 1,206.44, 1,667.32 and 911.60 is: 1,259.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206.44 : 1,667.32 = 911.60 : x
  2. Step 2: Convert to fraction form
    1,206.44/1,667.32 = 911.60/x
  3. Step 3: Cross multiply
    1,206.44x = 1,667.32 × 911.60
  4. Step 4: Simplify right side
    1,206.44x = 1,519,928.91
  5. Step 5: Solve for x
    x = 1,519,928.91/1,206.44
  6. Step 6: Final answer
    x = 1,259.85

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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.