Home / 1,640.88-2,457.27-1,272.60

Finding the Fourth Proportional to 1,640.88, 2,457.27 and 1,272.60

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Solution

The fourth proportional to 1,640.88, 2,457.27 and 1,272.60 is: 1,905.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.88 : 2,457.27 = 1,272.60 : x
  2. Step 2: Convert to fraction form
    1,640.88/2,457.27 = 1,272.60/x
  3. Step 3: Cross multiply
    1,640.88x = 2,457.27 × 1,272.60
  4. Step 4: Simplify right side
    1,640.88x = 3,127,121.80
  5. Step 5: Solve for x
    x = 3,127,121.80/1,640.88
  6. Step 6: Final answer
    x = 1,905.76

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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.