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Finding the Fourth Proportional to 613.28, 920.06 and 320.92

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Solution

The fourth proportional to 613.28, 920.06 and 320.92 is: 481.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.28 : 920.06 = 320.92 : x
  2. Step 2: Convert to fraction form
    613.28/920.06 = 320.92/x
  3. Step 3: Cross multiply
    613.28x = 920.06 × 320.92
  4. Step 4: Simplify right side
    613.28x = 295,265.66
  5. Step 5: Solve for x
    x = 295,265.66/613.28
  6. Step 6: Final answer
    x = 481.45

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.