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Finding the Fourth Proportional to 824.63, 1,138.19 and 475.52

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Solution

The fourth proportional to 824.63, 1,138.19 and 475.52 is: 656.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.63 : 1,138.19 = 475.52 : x
  2. Step 2: Convert to fraction form
    824.63/1,138.19 = 475.52/x
  3. Step 3: Cross multiply
    824.63x = 1,138.19 × 475.52
  4. Step 4: Simplify right side
    824.63x = 541,224.04
  5. Step 5: Solve for x
    x = 541,224.04/824.63
  6. Step 6: Final answer
    x = 656.33

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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.