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Finding the Fourth Proportional to 356.62, 491.45 and 245.89

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Solution

The fourth proportional to 356.62, 491.45 and 245.89 is: 338.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.62 : 491.45 = 245.89 : x
  2. Step 2: Convert to fraction form
    356.62/491.45 = 245.89/x
  3. Step 3: Cross multiply
    356.62x = 491.45 × 245.89
  4. Step 4: Simplify right side
    356.62x = 120,842.64
  5. Step 5: Solve for x
    x = 120,842.64/356.62
  6. Step 6: Final answer
    x = 338.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.