Home / 3,231.28-4,457.64-2,111.80

Finding the Fourth Proportional to 3,231.28, 4,457.64 and 2,111.80

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Solution

The fourth proportional to 3,231.28, 4,457.64 and 2,111.80 is: 2,913.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,231.28 : 4,457.64 = 2,111.80 : x
  2. Step 2: Convert to fraction form
    3,231.28/4,457.64 = 2,111.80/x
  3. Step 3: Cross multiply
    3,231.28x = 4,457.64 × 2,111.80
  4. Step 4: Simplify right side
    3,231.28x = 9,413,644.15
  5. Step 5: Solve for x
    x = 9,413,644.15/3,231.28
  6. Step 6: Final answer
    x = 2,913.29

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1.5x scale

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.