Home / 1,323.97-1,985.96-911.86

Finding the Fourth Proportional to 1,323.97, 1,985.96 and 911.86

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Solution

The fourth proportional to 1,323.97, 1,985.96 and 911.86 is: 1,367.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,323.97 : 1,985.96 = 911.86 : x
  2. Step 2: Convert to fraction form
    1,323.97/1,985.96 = 911.86/x
  3. Step 3: Cross multiply
    1,323.97x = 1,985.96 × 911.86
  4. Step 4: Simplify right side
    1,323.97x = 1,810,917.49
  5. Step 5: Solve for x
    x = 1,810,917.49/1,323.97
  6. Step 6: Final answer
    x = 1,367.79

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.