Home / 1,391.79-2,087.69-1,176.87

Finding the Fourth Proportional to 1,391.79, 2,087.69 and 1,176.87

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Solution

The fourth proportional to 1,391.79, 2,087.69 and 1,176.87 is: 1,765.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.79 : 2,087.69 = 1,176.87 : x
  2. Step 2: Convert to fraction form
    1,391.79/2,087.69 = 1,176.87/x
  3. Step 3: Cross multiply
    1,391.79x = 2,087.69 × 1,176.87
  4. Step 4: Simplify right side
    1,391.79x = 2,456,933.85
  5. Step 5: Solve for x
    x = 2,456,933.85/1,391.79
  6. Step 6: Final answer
    x = 1,765.31

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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.