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Finding the Fourth Proportional to 825.86, 1,236.67 and 547.36

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Solution

The fourth proportional to 825.86, 1,236.67 and 547.36 is: 819.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    825.86 : 1,236.67 = 547.36 : x
  2. Step 2: Convert to fraction form
    825.86/1,236.67 = 547.36/x
  3. Step 3: Cross multiply
    825.86x = 1,236.67 × 547.36
  4. Step 4: Simplify right side
    825.86x = 676,899.23
  5. Step 5: Solve for x
    x = 676,899.23/825.86
  6. Step 6: Final answer
    x = 819.63

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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.