Home / 2,990.49-4,127.25-1,811.56

Finding the Fourth Proportional to 2,990.49, 4,127.25 and 1,811.56

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Solution

The fourth proportional to 2,990.49, 4,127.25 and 1,811.56 is: 2,500.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.49 : 4,127.25 = 1,811.56 : x
  2. Step 2: Convert to fraction form
    2,990.49/4,127.25 = 1,811.56/x
  3. Step 3: Cross multiply
    2,990.49x = 4,127.25 × 1,811.56
  4. Step 4: Simplify right side
    2,990.49x = 7,476,751.95
  5. Step 5: Solve for x
    x = 7,476,751.95/2,990.49
  6. Step 6: Final answer
    x = 2,500.18

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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.