Home / 2,126.60-3,191.06-828.12

Finding the Fourth Proportional to 2,126.60, 3,191.06 and 828.12

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Solution

The fourth proportional to 2,126.60, 3,191.06 and 828.12 is: 1,242.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.60 : 3,191.06 = 828.12 : x
  2. Step 2: Convert to fraction form
    2,126.60/3,191.06 = 828.12/x
  3. Step 3: Cross multiply
    2,126.60x = 3,191.06 × 828.12
  4. Step 4: Simplify right side
    2,126.60x = 2,642,580.61
  5. Step 5: Solve for x
    x = 2,642,580.61/2,126.60
  6. Step 6: Final answer
    x = 1,242.63

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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.