Home / 2,990.45-4,126.70-1,664.13

Finding the Fourth Proportional to 2,990.45, 4,126.70 and 1,664.13

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Solution

The fourth proportional to 2,990.45, 4,126.70 and 1,664.13 is: 2,296.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.45 : 4,126.70 = 1,664.13 : x
  2. Step 2: Convert to fraction form
    2,990.45/4,126.70 = 1,664.13/x
  3. Step 3: Cross multiply
    2,990.45x = 4,126.70 × 1,664.13
  4. Step 4: Simplify right side
    2,990.45x = 6,867,361.69
  5. Step 5: Solve for x
    x = 6,867,361.69/2,990.45
  6. Step 6: Final answer
    x = 2,296.43

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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.