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Finding the Fourth Proportional to 1,794, 2,690.28 and 868.80

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Solution

The fourth proportional to 1,794, 2,690.28 and 868.80 is: 1,302.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,794 : 2,690.28 = 868.80 : x
  2. Step 2: Convert to fraction form
    1,794/2,690.28 = 868.80/x
  3. Step 3: Cross multiply
    1,794x = 2,690.28 × 868.80
  4. Step 4: Simplify right side
    1,794x = 2,337,315.26
  5. Step 5: Solve for x
    x = 2,337,315.26/1,794
  6. Step 6: Final answer
    x = 1,302.85

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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.