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Finding the Fourth Proportional to 836.86, 1,254.83 and 664.63

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Solution

The fourth proportional to 836.86, 1,254.83 and 664.63 is: 996.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.86 : 1,254.83 = 664.63 : x
  2. Step 2: Convert to fraction form
    836.86/1,254.83 = 664.63/x
  3. Step 3: Cross multiply
    836.86x = 1,254.83 × 664.63
  4. Step 4: Simplify right side
    836.86x = 833,997.66
  5. Step 5: Solve for x
    x = 833,997.66/836.86
  6. Step 6: Final answer
    x = 996.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.