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Finding the Fourth Proportional to 1,169.45, 1,613.96 and 672.11

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Solution

The fourth proportional to 1,169.45, 1,613.96 and 672.11 is: 927.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,169.45 : 1,613.96 = 672.11 : x
  2. Step 2: Convert to fraction form
    1,169.45/1,613.96 = 672.11/x
  3. Step 3: Cross multiply
    1,169.45x = 1,613.96 × 672.11
  4. Step 4: Simplify right side
    1,169.45x = 1,084,755.80
  5. Step 5: Solve for x
    x = 1,084,755.80/1,169.45
  6. Step 6: Final answer
    x = 927.58

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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.