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Finding the Fourth Proportional to 836.10, 1,153.49 and 481.86

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Solution

The fourth proportional to 836.10, 1,153.49 and 481.86 is: 664.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.10 : 1,153.49 = 481.86 : x
  2. Step 2: Convert to fraction form
    836.10/1,153.49 = 481.86/x
  3. Step 3: Cross multiply
    836.10x = 1,153.49 × 481.86
  4. Step 4: Simplify right side
    836.10x = 555,818.28
  5. Step 5: Solve for x
    x = 555,818.28/836.10
  6. Step 6: Final answer
    x = 664.77

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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.