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Finding the Fourth Proportional to 667.16, 921.06 and 481.12

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Solution

The fourth proportional to 667.16, 921.06 and 481.12 is: 664.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.16 : 921.06 = 481.12 : x
  2. Step 2: Convert to fraction form
    667.16/921.06 = 481.12/x
  3. Step 3: Cross multiply
    667.16x = 921.06 × 481.12
  4. Step 4: Simplify right side
    667.16x = 443,140.39
  5. Step 5: Solve for x
    x = 443,140.39/667.16
  6. Step 6: Final answer
    x = 664.22

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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.