Home / 1,719.20-2,578.35-1,171.28

Finding the Fourth Proportional to 1,719.20, 2,578.35 and 1,171.28

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Solution

The fourth proportional to 1,719.20, 2,578.35 and 1,171.28 is: 1,756.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,719.20 : 2,578.35 = 1,171.28 : x
  2. Step 2: Convert to fraction form
    1,719.20/2,578.35 = 1,171.28/x
  3. Step 3: Cross multiply
    1,719.20x = 2,578.35 × 1,171.28
  4. Step 4: Simplify right side
    1,719.20x = 3,019,969.79
  5. Step 5: Solve for x
    x = 3,019,969.79/1,719.20
  6. Step 6: Final answer
    x = 1,756.61

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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.