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Finding the Fourth Proportional to 1,195.27, 1,649.31 and 671.20

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Solution

The fourth proportional to 1,195.27, 1,649.31 and 671.20 is: 926.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,195.27 : 1,649.31 = 671.20 : x
  2. Step 2: Convert to fraction form
    1,195.27/1,649.31 = 671.20/x
  3. Step 3: Cross multiply
    1,195.27x = 1,649.31 × 671.20
  4. Step 4: Simplify right side
    1,195.27x = 1,107,016.87
  5. Step 5: Solve for x
    x = 1,107,016.87/1,195.27
  6. Step 6: Final answer
    x = 926.16

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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.