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Finding the Fourth Proportional to 396.84, 595.56 and 260.16

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Solution

The fourth proportional to 396.84, 595.56 and 260.16 is: 390.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.84 : 595.56 = 260.16 : x
  2. Step 2: Convert to fraction form
    396.84/595.56 = 260.16/x
  3. Step 3: Cross multiply
    396.84x = 595.56 × 260.16
  4. Step 4: Simplify right side
    396.84x = 154,940.89
  5. Step 5: Solve for x
    x = 154,940.89/396.84
  6. Step 6: Final answer
    x = 390.44

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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.