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Finding the Fourth Proportional to 1,169.72, 1,614.18 and 672.38

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Solution

The fourth proportional to 1,169.72, 1,614.18 and 672.38 is: 927.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,169.72 : 1,614.18 = 672.38 : x
  2. Step 2: Convert to fraction form
    1,169.72/1,614.18 = 672.38/x
  3. Step 3: Cross multiply
    1,169.72x = 1,614.18 × 672.38
  4. Step 4: Simplify right side
    1,169.72x = 1,085,342.35
  5. Step 5: Solve for x
    x = 1,085,342.35/1,169.72
  6. Step 6: Final answer
    x = 927.87

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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.