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Finding the Fourth Proportional to 396.85, 594.76 and 287.53

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Solution

The fourth proportional to 396.85, 594.76 and 287.53 is: 430.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.85 : 594.76 = 287.53 : x
  2. Step 2: Convert to fraction form
    396.85/594.76 = 287.53/x
  3. Step 3: Cross multiply
    396.85x = 594.76 × 287.53
  4. Step 4: Simplify right side
    396.85x = 171,011.34
  5. Step 5: Solve for x
    x = 171,011.34/396.85
  6. Step 6: Final answer
    x = 430.92

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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.