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Finding the Fourth Proportional to 1,971.62, 2,720.97 and 1,143.62

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Solution

The fourth proportional to 1,971.62, 2,720.97 and 1,143.62 is: 1,578.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.62 : 2,720.97 = 1,143.62 : x
  2. Step 2: Convert to fraction form
    1,971.62/2,720.97 = 1,143.62/x
  3. Step 3: Cross multiply
    1,971.62x = 2,720.97 × 1,143.62
  4. Step 4: Simplify right side
    1,971.62x = 3,111,755.71
  5. Step 5: Solve for x
    x = 3,111,755.71/1,971.62
  6. Step 6: Final answer
    x = 1,578.27

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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.