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Finding the Fourth Proportional to 641.98, 962.96 and 231.00

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Solution

The fourth proportional to 641.98, 962.96 and 231.00 is: 346.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.98 : 962.96 = 231.00 : x
  2. Step 2: Convert to fraction form
    641.98/962.96 = 231.00/x
  3. Step 3: Cross multiply
    641.98x = 962.96 × 231.00
  4. Step 4: Simplify right side
    641.98x = 222,446.36
  5. Step 5: Solve for x
    x = 222,446.36/641.98
  6. Step 6: Final answer
    x = 346.50

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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.