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Finding the Fourth Proportional to 1,335.03, 1,996.56 and 1,189.68

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Solution

The fourth proportional to 1,335.03, 1,996.56 and 1,189.68 is: 1,779.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,335.03 : 1,996.56 = 1,189.68 : x
  2. Step 2: Convert to fraction form
    1,335.03/1,996.56 = 1,189.68/x
  3. Step 3: Cross multiply
    1,335.03x = 1,996.56 × 1,189.68
  4. Step 4: Simplify right side
    1,335.03x = 2,375,267.50
  5. Step 5: Solve for x
    x = 2,375,267.50/1,335.03
  6. Step 6: Final answer
    x = 1,779.19

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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.