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Finding the Fourth Proportional to 1,999.58, 2,998.97 and 538.75

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Solution

The fourth proportional to 1,999.58, 2,998.97 and 538.75 is: 808.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,999.58 : 2,998.97 = 538.75 : x
  2. Step 2: Convert to fraction form
    1,999.58/2,998.97 = 538.75/x
  3. Step 3: Cross multiply
    1,999.58x = 2,998.97 × 538.75
  4. Step 4: Simplify right side
    1,999.58x = 1,615,695.09
  5. Step 5: Solve for x
    x = 1,615,695.09/1,999.58
  6. Step 6: Final answer
    x = 808.02

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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.