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Finding the Fourth Proportional to 641.92, 962.84 and 333.68

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Solution

The fourth proportional to 641.92, 962.84 and 333.68 is: 500.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.92 : 962.84 = 333.68 : x
  2. Step 2: Convert to fraction form
    641.92/962.84 = 333.68/x
  3. Step 3: Cross multiply
    641.92x = 962.84 × 333.68
  4. Step 4: Simplify right side
    641.92x = 321,280.45
  5. Step 5: Solve for x
    x = 321,280.45/641.92
  6. Step 6: Final answer
    x = 500.50

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Double scale
Find fourth proportional to 642.92, 964.34 and 334.68
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.