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Finding the Fourth Proportional to 447.64, 617.71 and 261.13

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Solution

The fourth proportional to 447.64, 617.71 and 261.13 is: 360.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.64 : 617.71 = 261.13 : x
  2. Step 2: Convert to fraction form
    447.64/617.71 = 261.13/x
  3. Step 3: Cross multiply
    447.64x = 617.71 × 261.13
  4. Step 4: Simplify right side
    447.64x = 161,302.61
  5. Step 5: Solve for x
    x = 161,302.61/447.64
  6. Step 6: Final answer
    x = 360.34

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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.