Home / 2,126.88-3,190.32-828.18

Finding the Fourth Proportional to 2,126.88, 3,190.32 and 828.18

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Solution

The fourth proportional to 2,126.88, 3,190.32 and 828.18 is: 1,242.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.88 : 3,190.32 = 828.18 : x
  2. Step 2: Convert to fraction form
    2,126.88/3,190.32 = 828.18/x
  3. Step 3: Cross multiply
    2,126.88x = 3,190.32 × 828.18
  4. Step 4: Simplify right side
    2,126.88x = 2,642,159.22
  5. Step 5: Solve for x
    x = 2,642,159.22/2,126.88
  6. Step 6: Final answer
    x = 1,242.27

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1.5x scale

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.