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Finding the Fourth Proportional to 358.05, 494.06 and 210.74

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Solution

The fourth proportional to 358.05, 494.06 and 210.74 is: 290.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.05 : 494.06 = 210.74 : x
  2. Step 2: Convert to fraction form
    358.05/494.06 = 210.74/x
  3. Step 3: Cross multiply
    358.05x = 494.06 × 210.74
  4. Step 4: Simplify right side
    358.05x = 104,114.68
  5. Step 5: Solve for x
    x = 104,114.68/358.05
  6. Step 6: Final answer
    x = 290.78

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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.