Home / 2,127.45-3,189.35-828.62

Finding the Fourth Proportional to 2,127.45, 3,189.35 and 828.62

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Solution

The fourth proportional to 2,127.45, 3,189.35 and 828.62 is: 1,242.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,127.45 : 3,189.35 = 828.62 : x
  2. Step 2: Convert to fraction form
    2,127.45/3,189.35 = 828.62/x
  3. Step 3: Cross multiply
    2,127.45x = 3,189.35 × 828.62
  4. Step 4: Simplify right side
    2,127.45x = 2,642,739.11
  5. Step 5: Solve for x
    x = 2,642,739.11/2,127.45
  6. Step 6: Final answer
    x = 1,242.21

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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.