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Finding the Fourth Proportional to 396.61, 594.55 and 288.61

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Solution

The fourth proportional to 396.61, 594.55 and 288.61 is: 432.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.61 : 594.55 = 288.61 : x
  2. Step 2: Convert to fraction form
    396.61/594.55 = 288.61/x
  3. Step 3: Cross multiply
    396.61x = 594.55 × 288.61
  4. Step 4: Simplify right side
    396.61x = 171,593.08
  5. Step 5: Solve for x
    x = 171,593.08/396.61
  6. Step 6: Final answer
    x = 432.65

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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.