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Finding the Fourth Proportional to 638.07, 957.21 and 227.46

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Solution

The fourth proportional to 638.07, 957.21 and 227.46 is: 341.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.07 : 957.21 = 227.46 : x
  2. Step 2: Convert to fraction form
    638.07/957.21 = 227.46/x
  3. Step 3: Cross multiply
    638.07x = 957.21 × 227.46
  4. Step 4: Simplify right side
    638.07x = 217,726.99
  5. Step 5: Solve for x
    x = 217,726.99/638.07
  6. Step 6: Final answer
    x = 341.23

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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.