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Finding the Fourth Proportional to 854.60, 1,179.28 and 481.48

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Solution

The fourth proportional to 854.60, 1,179.28 and 481.48 is: 664.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    854.60 : 1,179.28 = 481.48 : x
  2. Step 2: Convert to fraction form
    854.60/1,179.28 = 481.48/x
  3. Step 3: Cross multiply
    854.60x = 1,179.28 × 481.48
  4. Step 4: Simplify right side
    854.60x = 567,799.73
  5. Step 5: Solve for x
    x = 567,799.73/854.60
  6. Step 6: Final answer
    x = 664.40

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1.5x scale

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.