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Finding the Fourth Proportional to 447.36, 617.19 and 260.78

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Solution

The fourth proportional to 447.36, 617.19 and 260.78 is: 359.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.36 : 617.19 = 260.78 : x
  2. Step 2: Convert to fraction form
    447.36/617.19 = 260.78/x
  3. Step 3: Cross multiply
    447.36x = 617.19 × 260.78
  4. Step 4: Simplify right side
    447.36x = 160,947.72
  5. Step 5: Solve for x
    x = 160,947.72/447.36
  6. Step 6: Final answer
    x = 359.78

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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.