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Finding the Fourth Proportional to 1,659.26, 2,486.82 and 684.38

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Solution

The fourth proportional to 1,659.26, 2,486.82 and 684.38 is: 1,025.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,659.26 : 2,486.82 = 684.38 : x
  2. Step 2: Convert to fraction form
    1,659.26/2,486.82 = 684.38/x
  3. Step 3: Cross multiply
    1,659.26x = 2,486.82 × 684.38
  4. Step 4: Simplify right side
    1,659.26x = 1,701,929.87
  5. Step 5: Solve for x
    x = 1,701,929.87/1,659.26
  6. Step 6: Final answer
    x = 1,025.72

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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.