Home / 1,176.24-1,765.80-745.20

Finding the Fourth Proportional to 1,176.24, 1,765.80 and 745.20

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Solution

The fourth proportional to 1,176.24, 1,765.80 and 745.20 is: 1,118.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,176.24 : 1,765.80 = 745.20 : x
  2. Step 2: Convert to fraction form
    1,176.24/1,765.80 = 745.20/x
  3. Step 3: Cross multiply
    1,176.24x = 1,765.80 × 745.20
  4. Step 4: Simplify right side
    1,176.24x = 1,315,874.16
  5. Step 5: Solve for x
    x = 1,315,874.16/1,176.24
  6. Step 6: Final answer
    x = 1,118.71

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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.