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Finding the Fourth Proportional to 828.41, 1,242.72 and 308.36

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Solution

The fourth proportional to 828.41, 1,242.72 and 308.36 is: 462.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    828.41 : 1,242.72 = 308.36 : x
  2. Step 2: Convert to fraction form
    828.41/1,242.72 = 308.36/x
  3. Step 3: Cross multiply
    828.41x = 1,242.72 × 308.36
  4. Step 4: Simplify right side
    828.41x = 383,208.25
  5. Step 5: Solve for x
    x = 383,208.25/828.41
  6. Step 6: Final answer
    x = 462.59

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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.