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Finding the Fourth Proportional to 441.56, 661.86 and 248.78

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Solution

The fourth proportional to 441.56, 661.86 and 248.78 is: 372.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.56 : 661.86 = 248.78 : x
  2. Step 2: Convert to fraction form
    441.56/661.86 = 248.78/x
  3. Step 3: Cross multiply
    441.56x = 661.86 × 248.78
  4. Step 4: Simplify right side
    441.56x = 164,657.53
  5. Step 5: Solve for x
    x = 164,657.53/441.56
  6. Step 6: Final answer
    x = 372.90

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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.