Home / 1,199.15-1,655.26-905.12

Finding the Fourth Proportional to 1,199.15, 1,655.26 and 905.12

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Solution

The fourth proportional to 1,199.15, 1,655.26 and 905.12 is: 1,249.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,199.15 : 1,655.26 = 905.12 : x
  2. Step 2: Convert to fraction form
    1,199.15/1,655.26 = 905.12/x
  3. Step 3: Cross multiply
    1,199.15x = 1,655.26 × 905.12
  4. Step 4: Simplify right side
    1,199.15x = 1,498,198.39
  5. Step 5: Solve for x
    x = 1,498,198.39/1,199.15
  6. Step 6: Final answer
    x = 1,249.39

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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.