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Finding the Fourth Proportional to 427.97, 590.39 and 261.89

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Solution

The fourth proportional to 427.97, 590.39 and 261.89 is: 361.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.97 : 590.39 = 261.89 : x
  2. Step 2: Convert to fraction form
    427.97/590.39 = 261.89/x
  3. Step 3: Cross multiply
    427.97x = 590.39 × 261.89
  4. Step 4: Simplify right side
    427.97x = 154,617.40
  5. Step 5: Solve for x
    x = 154,617.40/427.97
  6. Step 6: Final answer
    x = 361.28

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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.