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Finding the Fourth Proportional to 358.60, 494.90 and 211.16

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Solution

The fourth proportional to 358.60, 494.90 and 211.16 is: 291.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.60 : 494.90 = 211.16 : x
  2. Step 2: Convert to fraction form
    358.60/494.90 = 211.16/x
  3. Step 3: Cross multiply
    358.60x = 494.90 × 211.16
  4. Step 4: Simplify right side
    358.60x = 104,503.08
  5. Step 5: Solve for x
    x = 104,503.08/358.60
  6. Step 6: Final answer
    x = 291.42

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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.