Home / 2,290.80-3,161.21-1,242.84

Finding the Fourth Proportional to 2,290.80, 3,161.21 and 1,242.84

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Solution

The fourth proportional to 2,290.80, 3,161.21 and 1,242.84 is: 1,715.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,290.80 : 3,161.21 = 1,242.84 : x
  2. Step 2: Convert to fraction form
    2,290.80/3,161.21 = 1,242.84/x
  3. Step 3: Cross multiply
    2,290.80x = 3,161.21 × 1,242.84
  4. Step 4: Simplify right side
    2,290.80x = 3,928,878.24
  5. Step 5: Solve for x
    x = 3,928,878.24/2,290.80
  6. Step 6: Final answer
    x = 1,715.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.