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Finding the Fourth Proportional to 835.10, 1,153.34 and 743.48

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Solution

The fourth proportional to 835.10, 1,153.34 and 743.48 is: 1,026.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.10 : 1,153.34 = 743.48 : x
  2. Step 2: Convert to fraction form
    835.10/1,153.34 = 743.48/x
  3. Step 3: Cross multiply
    835.10x = 1,153.34 × 743.48
  4. Step 4: Simplify right side
    835.10x = 857,485.22
  5. Step 5: Solve for x
    x = 857,485.22/835.10
  6. Step 6: Final answer
    x = 1,026.81

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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.