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Finding the Fourth Proportional to 638.23, 957.09 and 248.02

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Solution

The fourth proportional to 638.23, 957.09 and 248.02 is: 371.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.23 : 957.09 = 248.02 : x
  2. Step 2: Convert to fraction form
    638.23/957.09 = 248.02/x
  3. Step 3: Cross multiply
    638.23x = 957.09 × 248.02
  4. Step 4: Simplify right side
    638.23x = 237,377.46
  5. Step 5: Solve for x
    x = 237,377.46/638.23
  6. Step 6: Final answer
    x = 371.93

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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.