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Finding the Fourth Proportional to 824.28, 1,238.06 and 547.48

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Solution

The fourth proportional to 824.28, 1,238.06 and 547.48 is: 822.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.28 : 1,238.06 = 547.48 : x
  2. Step 2: Convert to fraction form
    824.28/1,238.06 = 547.48/x
  3. Step 3: Cross multiply
    824.28x = 1,238.06 × 547.48
  4. Step 4: Simplify right side
    824.28x = 677,813.09
  5. Step 5: Solve for x
    x = 677,813.09/824.28
  6. Step 6: Final answer
    x = 822.31

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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.