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Finding the Fourth Proportional to 654.30, 981.45 and 329.67

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Solution

The fourth proportional to 654.30, 981.45 and 329.67 is: 494.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.30 : 981.45 = 329.67 : x
  2. Step 2: Convert to fraction form
    654.30/981.45 = 329.67/x
  3. Step 3: Cross multiply
    654.30x = 981.45 × 329.67
  4. Step 4: Simplify right side
    654.30x = 323,554.62
  5. Step 5: Solve for x
    x = 323,554.62/654.30
  6. Step 6: Final answer
    x = 494.51

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.