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Finding the Fourth Proportional to 638.50, 957.95 and 248.66

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Solution

The fourth proportional to 638.50, 957.95 and 248.66 is: 373.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.50 : 957.95 = 248.66 : x
  2. Step 2: Convert to fraction form
    638.50/957.95 = 248.66/x
  3. Step 3: Cross multiply
    638.50x = 957.95 × 248.66
  4. Step 4: Simplify right side
    638.50x = 238,202.60
  5. Step 5: Solve for x
    x = 238,202.60/638.50
  6. Step 6: Final answer
    x = 373.07

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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.