Home / 2,990.30-4,126.78-1,664.16

Finding the Fourth Proportional to 2,990.30, 4,126.78 and 1,664.16

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Solution

The fourth proportional to 2,990.30, 4,126.78 and 1,664.16 is: 2,296.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.30 : 4,126.78 = 1,664.16 : x
  2. Step 2: Convert to fraction form
    2,990.30/4,126.78 = 1,664.16/x
  3. Step 3: Cross multiply
    2,990.30x = 4,126.78 × 1,664.16
  4. Step 4: Simplify right side
    2,990.30x = 6,867,622.20
  5. Step 5: Solve for x
    x = 6,867,622.20/2,990.30
  6. Step 6: Final answer
    x = 2,296.63

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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.