Home / 1,187.21-1,634.33-1,020.45

Finding the Fourth Proportional to 1,187.21, 1,634.33 and 1,020.45

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Solution

The fourth proportional to 1,187.21, 1,634.33 and 1,020.45 is: 1,404.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187.21 : 1,634.33 = 1,020.45 : x
  2. Step 2: Convert to fraction form
    1,187.21/1,634.33 = 1,020.45/x
  3. Step 3: Cross multiply
    1,187.21x = 1,634.33 × 1,020.45
  4. Step 4: Simplify right side
    1,187.21x = 1,667,745.80
  5. Step 5: Solve for x
    x = 1,667,745.80/1,187.21
  6. Step 6: Final answer
    x = 1,404.76

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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.