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Finding the Fourth Proportional to 447.50, 617.50 and 248.29

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Solution

The fourth proportional to 447.50, 617.50 and 248.29 is: 342.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.50 : 617.50 = 248.29 : x
  2. Step 2: Convert to fraction form
    447.50/617.50 = 248.29/x
  3. Step 3: Cross multiply
    447.50x = 617.50 × 248.29
  4. Step 4: Simplify right side
    447.50x = 153,318.88
  5. Step 5: Solve for x
    x = 153,318.88/447.50
  6. Step 6: Final answer
    x = 342.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.