Home / 2,990.17-4,127.12-1,940.41

Finding the Fourth Proportional to 2,990.17, 4,127.12 and 1,940.41

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Solution

The fourth proportional to 2,990.17, 4,127.12 and 1,940.41 is: 2,678.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.17 : 4,127.12 = 1,940.41 : x
  2. Step 2: Convert to fraction form
    2,990.17/4,127.12 = 1,940.41/x
  3. Step 3: Cross multiply
    2,990.17x = 4,127.12 × 1,940.41
  4. Step 4: Simplify right side
    2,990.17x = 8,008,304.92
  5. Step 5: Solve for x
    x = 8,008,304.92/2,990.17
  6. Step 6: Final answer
    x = 2,678.21

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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.