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Finding the Fourth Proportional to 358.05, 494.66 and 306.13

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Solution

The fourth proportional to 358.05, 494.66 and 306.13 is: 422.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.05 : 494.66 = 306.13 : x
  2. Step 2: Convert to fraction form
    358.05/494.66 = 306.13/x
  3. Step 3: Cross multiply
    358.05x = 494.66 × 306.13
  4. Step 4: Simplify right side
    358.05x = 151,430.27
  5. Step 5: Solve for x
    x = 151,430.27/358.05
  6. Step 6: Final answer
    x = 422.93

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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.