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Finding the Fourth Proportional to 1,880.43, 2,821.13 and 1,191.99

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Solution

The fourth proportional to 1,880.43, 2,821.13 and 1,191.99 is: 1,788.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,880.43 : 2,821.13 = 1,191.99 : x
  2. Step 2: Convert to fraction form
    1,880.43/2,821.13 = 1,191.99/x
  3. Step 3: Cross multiply
    1,880.43x = 2,821.13 × 1,191.99
  4. Step 4: Simplify right side
    1,880.43x = 3,362,752.79
  5. Step 5: Solve for x
    x = 3,362,752.79/1,880.43
  6. Step 6: Final answer
    x = 1,788.29

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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.