Home / 2,990.45-4,129.89-2,243.23

Finding the Fourth Proportional to 2,990.45, 4,129.89 and 2,243.23

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Solution

The fourth proportional to 2,990.45, 4,129.89 and 2,243.23 is: 3,097.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.45 : 4,129.89 = 2,243.23 : x
  2. Step 2: Convert to fraction form
    2,990.45/4,129.89 = 2,243.23/x
  3. Step 3: Cross multiply
    2,990.45x = 4,129.89 × 2,243.23
  4. Step 4: Simplify right side
    2,990.45x = 9,264,274.41
  5. Step 5: Solve for x
    x = 9,264,274.41/2,990.45
  6. Step 6: Final answer
    x = 3,097.95

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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.