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Finding the Fourth Proportional to 396.57, 594.83 and 139.89

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Solution

The fourth proportional to 396.57, 594.83 and 139.89 is: 209.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.57 : 594.83 = 139.89 : x
  2. Step 2: Convert to fraction form
    396.57/594.83 = 139.89/x
  3. Step 3: Cross multiply
    396.57x = 594.83 × 139.89
  4. Step 4: Simplify right side
    396.57x = 83,210.07
  5. Step 5: Solve for x
    x = 83,210.07/396.57
  6. Step 6: Final answer
    x = 209.82

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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.