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Finding the Fourth Proportional to 1,083.33, 1,620.90 and 808.47

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Solution

The fourth proportional to 1,083.33, 1,620.90 and 808.47 is: 1,209.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,083.33 : 1,620.90 = 808.47 : x
  2. Step 2: Convert to fraction form
    1,083.33/1,620.90 = 808.47/x
  3. Step 3: Cross multiply
    1,083.33x = 1,620.90 × 808.47
  4. Step 4: Simplify right side
    1,083.33x = 1,310,449.02
  5. Step 5: Solve for x
    x = 1,310,449.02/1,083.33
  6. Step 6: Final answer
    x = 1,209.65

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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.