Home / 2,612.10-3,920.35-1,378.87

Finding the Fourth Proportional to 2,612.10, 3,920.35 and 1,378.87

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Solution

The fourth proportional to 2,612.10, 3,920.35 and 1,378.87 is: 2,069.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,612.10 : 3,920.35 = 1,378.87 : x
  2. Step 2: Convert to fraction form
    2,612.10/3,920.35 = 1,378.87/x
  3. Step 3: Cross multiply
    2,612.10x = 3,920.35 × 1,378.87
  4. Step 4: Simplify right side
    2,612.10x = 5,405,653.00
  5. Step 5: Solve for x
    x = 5,405,653.00/2,612.10
  6. Step 6: Final answer
    x = 2,069.47

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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.