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Finding the Fourth Proportional to 445.75, 615.14 and 261.75

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Solution

The fourth proportional to 445.75, 615.14 and 261.75 is: 361.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.75 : 615.14 = 261.75 : x
  2. Step 2: Convert to fraction form
    445.75/615.14 = 261.75/x
  3. Step 3: Cross multiply
    445.75x = 615.14 × 261.75
  4. Step 4: Simplify right side
    445.75x = 161,012.90
  5. Step 5: Solve for x
    x = 161,012.90/445.75
  6. Step 6: Final answer
    x = 361.22

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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.