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Finding the Fourth Proportional to 374.03, 515.90 and 261.79

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Solution

The fourth proportional to 374.03, 515.90 and 261.79 is: 361.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.03 : 515.90 = 261.79 : x
  2. Step 2: Convert to fraction form
    374.03/515.90 = 261.79/x
  3. Step 3: Cross multiply
    374.03x = 515.90 × 261.79
  4. Step 4: Simplify right side
    374.03x = 135,059.73
  5. Step 5: Solve for x
    x = 135,059.73/374.03
  6. Step 6: Final answer
    x = 361.09

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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.