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Finding the Fourth Proportional to 1,195.16, 1,648.55 and 729.41

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Solution

The fourth proportional to 1,195.16, 1,648.55 and 729.41 is: 1,006.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,195.16 : 1,648.55 = 729.41 : x
  2. Step 2: Convert to fraction form
    1,195.16/1,648.55 = 729.41/x
  3. Step 3: Cross multiply
    1,195.16x = 1,648.55 × 729.41
  4. Step 4: Simplify right side
    1,195.16x = 1,202,462.44
  5. Step 5: Solve for x
    x = 1,202,462.44/1,195.16
  6. Step 6: Final answer
    x = 1,006.11

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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.