Home / 1,378.35-2,065.37-1,172.07

Finding the Fourth Proportional to 1,378.35, 2,065.37 and 1,172.07

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Solution

The fourth proportional to 1,378.35, 2,065.37 and 1,172.07 is: 1,756.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.35 : 2,065.37 = 1,172.07 : x
  2. Step 2: Convert to fraction form
    1,378.35/2,065.37 = 1,172.07/x
  3. Step 3: Cross multiply
    1,378.35x = 2,065.37 × 1,172.07
  4. Step 4: Simplify right side
    1,378.35x = 2,420,764.50
  5. Step 5: Solve for x
    x = 2,420,764.50/1,378.35
  6. Step 6: Final answer
    x = 1,756.27

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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.