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Finding the Fourth Proportional to 668.12, 920.10 and 481.32

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Solution

The fourth proportional to 668.12, 920.10 and 481.32 is: 662.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.12 : 920.10 = 481.32 : x
  2. Step 2: Convert to fraction form
    668.12/920.10 = 481.32/x
  3. Step 3: Cross multiply
    668.12x = 920.10 × 481.32
  4. Step 4: Simplify right side
    668.12x = 442,858.36
  5. Step 5: Solve for x
    x = 442,858.36/668.12
  6. Step 6: Final answer
    x = 662.84

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Half scale
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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.