Home / 2,649.27-3,969-1,331.49

Finding the Fourth Proportional to 2,649.27, 3,969 and 1,331.49

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Solution

The fourth proportional to 2,649.27, 3,969 and 1,331.49 is: 1,994.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,649.27 : 3,969 = 1,331.49 : x
  2. Step 2: Convert to fraction form
    2,649.27/3,969 = 1,331.49/x
  3. Step 3: Cross multiply
    2,649.27x = 3,969 × 1,331.49
  4. Step 4: Simplify right side
    2,649.27x = 5,284,683.81
  5. Step 5: Solve for x
    x = 5,284,683.81/2,649.27
  6. Step 6: Final answer
    x = 1,994.77

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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.