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Finding the Fourth Proportional to 668.38, 921.06 and 481.54

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Solution

The fourth proportional to 668.38, 921.06 and 481.54 is: 663.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.38 : 921.06 = 481.54 : x
  2. Step 2: Convert to fraction form
    668.38/921.06 = 481.54/x
  3. Step 3: Cross multiply
    668.38x = 921.06 × 481.54
  4. Step 4: Simplify right side
    668.38x = 443,527.23
  5. Step 5: Solve for x
    x = 443,527.23/668.38
  6. Step 6: Final answer
    x = 663.59

Related Problems

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Half scale
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Double scale
Find fourth proportional to 669.38, 922.44 and 482.54
Similar ratio
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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.