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Finding the Fourth Proportional to 638.30, 957.60 and 205.46

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Solution

The fourth proportional to 638.30, 957.60 and 205.46 is: 308.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.30 : 957.60 = 205.46 : x
  2. Step 2: Convert to fraction form
    638.30/957.60 = 205.46/x
  3. Step 3: Cross multiply
    638.30x = 957.60 × 205.46
  4. Step 4: Simplify right side
    638.30x = 196,748.50
  5. Step 5: Solve for x
    x = 196,748.50/638.30
  6. Step 6: Final answer
    x = 308.24

Related Problems

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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.