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Finding the Fourth Proportional to 654.81, 982.61 and 330.21

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Solution

The fourth proportional to 654.81, 982.61 and 330.21 is: 495.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.81 : 982.61 = 330.21 : x
  2. Step 2: Convert to fraction form
    654.81/982.61 = 330.21/x
  3. Step 3: Cross multiply
    654.81x = 982.61 × 330.21
  4. Step 4: Simplify right side
    654.81x = 324,466.00
  5. Step 5: Solve for x
    x = 324,466.00/654.81
  6. Step 6: Final answer
    x = 495.51

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.