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Finding the Fourth Proportional to 358.56, 491.94 and 349.38

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Solution

The fourth proportional to 358.56, 491.94 and 349.38 is: 479.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.56 : 491.94 = 349.38 : x
  2. Step 2: Convert to fraction form
    358.56/491.94 = 349.38/x
  3. Step 3: Cross multiply
    358.56x = 491.94 × 349.38
  4. Step 4: Simplify right side
    358.56x = 171,874.00
  5. Step 5: Solve for x
    x = 171,874.00/358.56
  6. Step 6: Final answer
    x = 479.35

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.