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Finding the Fourth Proportional to 825.55, 1,238.50 and 248.38

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Solution

The fourth proportional to 825.55, 1,238.50 and 248.38 is: 372.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    825.55 : 1,238.50 = 248.38 : x
  2. Step 2: Convert to fraction form
    825.55/1,238.50 = 248.38/x
  3. Step 3: Cross multiply
    825.55x = 1,238.50 × 248.38
  4. Step 4: Simplify right side
    825.55x = 307,618.63
  5. Step 5: Solve for x
    x = 307,618.63/825.55
  6. Step 6: Final answer
    x = 372.62

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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.