Home / 1,981.28-2,970.09-1,817.26

Finding the Fourth Proportional to 1,981.28, 2,970.09 and 1,817.26

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Solution

The fourth proportional to 1,981.28, 2,970.09 and 1,817.26 is: 2,724.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.28 : 2,970.09 = 1,817.26 : x
  2. Step 2: Convert to fraction form
    1,981.28/2,970.09 = 1,817.26/x
  3. Step 3: Cross multiply
    1,981.28x = 2,970.09 × 1,817.26
  4. Step 4: Simplify right side
    1,981.28x = 5,397,418.33
  5. Step 5: Solve for x
    x = 5,397,418.33/1,981.28
  6. Step 6: Final answer
    x = 2,724.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.