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Finding the Fourth Proportional to 641.36, 962.20 and 333.12

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Solution

The fourth proportional to 641.36, 962.20 and 333.12 is: 499.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.36 : 962.20 = 333.12 : x
  2. Step 2: Convert to fraction form
    641.36/962.20 = 333.12/x
  3. Step 3: Cross multiply
    641.36x = 962.20 × 333.12
  4. Step 4: Simplify right side
    641.36x = 320,528.06
  5. Step 5: Solve for x
    x = 320,528.06/641.36
  6. Step 6: Final answer
    x = 499.76

Related Problems

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Half scale
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Double scale
Find fourth proportional to 642.36, 963.70 and 334.12
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.