Home / 1,256.45-1,884.74-1,187.19

Finding the Fourth Proportional to 1,256.45, 1,884.74 and 1,187.19

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Solution

The fourth proportional to 1,256.45, 1,884.74 and 1,187.19 is: 1,780.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,256.45 : 1,884.74 = 1,187.19 : x
  2. Step 2: Convert to fraction form
    1,256.45/1,884.74 = 1,187.19/x
  3. Step 3: Cross multiply
    1,256.45x = 1,884.74 × 1,187.19
  4. Step 4: Simplify right side
    1,256.45x = 2,237,538.54
  5. Step 5: Solve for x
    x = 2,237,538.54/1,256.45
  6. Step 6: Final answer
    x = 1,780.85

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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.