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Finding the Fourth Proportional to 396.90, 595.62 and 345.06

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Solution

The fourth proportional to 396.90, 595.62 and 345.06 is: 517.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.90 : 595.62 = 345.06 : x
  2. Step 2: Convert to fraction form
    396.90/595.62 = 345.06/x
  3. Step 3: Cross multiply
    396.90x = 595.62 × 345.06
  4. Step 4: Simplify right side
    396.90x = 205,524.64
  5. Step 5: Solve for x
    x = 205,524.64/396.90
  6. Step 6: Final answer
    x = 517.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.