Home / 1,272.49-1,742.87-1,197.77

Finding the Fourth Proportional to 1,272.49, 1,742.87 and 1,197.77

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Solution

The fourth proportional to 1,272.49, 1,742.87 and 1,197.77 is: 1,640.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272.49 : 1,742.87 = 1,197.77 : x
  2. Step 2: Convert to fraction form
    1,272.49/1,742.87 = 1,197.77/x
  3. Step 3: Cross multiply
    1,272.49x = 1,742.87 × 1,197.77
  4. Step 4: Simplify right side
    1,272.49x = 2,087,551.68
  5. Step 5: Solve for x
    x = 2,087,551.68/1,272.49
  6. Step 6: Final answer
    x = 1,640.53

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.