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Finding the Fourth Proportional to 1,169.78, 1,613.54 and 704.04

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Solution

The fourth proportional to 1,169.78, 1,613.54 and 704.04 is: 971.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,169.78 : 1,613.54 = 704.04 : x
  2. Step 2: Convert to fraction form
    1,169.78/1,613.54 = 704.04/x
  3. Step 3: Cross multiply
    1,169.78x = 1,613.54 × 704.04
  4. Step 4: Simplify right side
    1,169.78x = 1,135,996.70
  5. Step 5: Solve for x
    x = 1,135,996.70/1,169.78
  6. Step 6: Final answer
    x = 971.12

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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.