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Finding the Fourth Proportional to 667.18, 920.19 and 481.36

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Solution

The fourth proportional to 667.18, 920.19 and 481.36 is: 663.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.18 : 920.19 = 481.36 : x
  2. Step 2: Convert to fraction form
    667.18/920.19 = 481.36/x
  3. Step 3: Cross multiply
    667.18x = 920.19 × 481.36
  4. Step 4: Simplify right side
    667.18x = 442,942.66
  5. Step 5: Solve for x
    x = 442,942.66/667.18
  6. Step 6: Final answer
    x = 663.90

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Double scale
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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.