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Finding the Fourth Proportional to 1,449.26, 1,999.96 and 828.38

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Solution

The fourth proportional to 1,449.26, 1,999.96 and 828.38 is: 1,143.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,449.26 : 1,999.96 = 828.38 : x
  2. Step 2: Convert to fraction form
    1,449.26/1,999.96 = 828.38/x
  3. Step 3: Cross multiply
    1,449.26x = 1,999.96 × 828.38
  4. Step 4: Simplify right side
    1,449.26x = 1,656,726.86
  5. Step 5: Solve for x
    x = 1,656,726.86/1,449.26
  6. Step 6: Final answer
    x = 1,143.15

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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.