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Finding the Fourth Proportional to 843.23, 1,165.15 and 648.43

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Solution

The fourth proportional to 843.23, 1,165.15 and 648.43 is: 895.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.23 : 1,165.15 = 648.43 : x
  2. Step 2: Convert to fraction form
    843.23/1,165.15 = 648.43/x
  3. Step 3: Cross multiply
    843.23x = 1,165.15 × 648.43
  4. Step 4: Simplify right side
    843.23x = 755,516.11
  5. Step 5: Solve for x
    x = 755,516.11/843.23
  6. Step 6: Final answer
    x = 895.98

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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.