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Finding the Fourth Proportional to 2,990.26, 4,126.26 and 1,811.26

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Solution

The fourth proportional to 2,990.26, 4,126.26 and 1,811.26 is: 2,499.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.26 : 4,126.26 = 1,811.26 : x
  2. Step 2: Convert to fraction form
    2,990.26/4,126.26 = 1,811.26/x
  3. Step 3: Cross multiply
    2,990.26x = 4,126.26 × 1,811.26
  4. Step 4: Simplify right side
    2,990.26x = 7,473,729.69
  5. Step 5: Solve for x
    x = 7,473,729.69/2,990.26
  6. Step 6: Final answer
    x = 2,499.36

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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.