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Finding the Fourth Proportional to 638.58, 957.63 and 227.61

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Solution

The fourth proportional to 638.58, 957.63 and 227.61 is: 341.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.58 : 957.63 = 227.61 : x
  2. Step 2: Convert to fraction form
    638.58/957.63 = 227.61/x
  3. Step 3: Cross multiply
    638.58x = 957.63 × 227.61
  4. Step 4: Simplify right side
    638.58x = 217,961.38
  5. Step 5: Solve for x
    x = 217,961.38/638.58
  6. Step 6: Final answer
    x = 341.32

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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.