Home / 2,119.12-3,172.08-1,142.80

Finding the Fourth Proportional to 2,119.12, 3,172.08 and 1,142.80

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Solution

The fourth proportional to 2,119.12, 3,172.08 and 1,142.80 is: 1,710.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,119.12 : 3,172.08 = 1,142.80 : x
  2. Step 2: Convert to fraction form
    2,119.12/3,172.08 = 1,142.80/x
  3. Step 3: Cross multiply
    2,119.12x = 3,172.08 × 1,142.80
  4. Step 4: Simplify right side
    2,119.12x = 3,625,053.02
  5. Step 5: Solve for x
    x = 3,625,053.02/2,119.12
  6. Step 6: Final answer
    x = 1,710.64

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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.