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Finding the Fourth Proportional to 638.02, 957.12 and 227.03

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Solution

The fourth proportional to 638.02, 957.12 and 227.03 is: 340.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.02 : 957.12 = 227.03 : x
  2. Step 2: Convert to fraction form
    638.02/957.12 = 227.03/x
  3. Step 3: Cross multiply
    638.02x = 957.12 × 227.03
  4. Step 4: Simplify right side
    638.02x = 217,296.50
  5. Step 5: Solve for x
    x = 217,296.50/638.02
  6. Step 6: Final answer
    x = 340.58

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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.