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Finding the Fourth Proportional to 1,696.10, 2,544.20 and 806.40

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Solution

The fourth proportional to 1,696.10, 2,544.20 and 806.40 is: 1,209.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,696.10 : 2,544.20 = 806.40 : x
  2. Step 2: Convert to fraction form
    1,696.10/2,544.20 = 806.40/x
  3. Step 3: Cross multiply
    1,696.10x = 2,544.20 × 806.40
  4. Step 4: Simplify right side
    1,696.10x = 2,051,638.85
  5. Step 5: Solve for x
    x = 2,051,638.85/1,696.10
  6. Step 6: Final answer
    x = 1,209.62

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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.