Home / 1,272.12-1,897.78-1,236.84

Finding the Fourth Proportional to 1,272.12, 1,897.78 and 1,236.84

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Solution

The fourth proportional to 1,272.12, 1,897.78 and 1,236.84 is: 1,845.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272.12 : 1,897.78 = 1,236.84 : x
  2. Step 2: Convert to fraction form
    1,272.12/1,897.78 = 1,236.84/x
  3. Step 3: Cross multiply
    1,272.12x = 1,897.78 × 1,236.84
  4. Step 4: Simplify right side
    1,272.12x = 2,347,250.22
  5. Step 5: Solve for x
    x = 2,347,250.22/1,272.12
  6. Step 6: Final answer
    x = 1,845.15

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.