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Finding the Fourth Proportional to 358.86, 494.55 and 255.18

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Solution

The fourth proportional to 358.86, 494.55 and 255.18 is: 351.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.86 : 494.55 = 255.18 : x
  2. Step 2: Convert to fraction form
    358.86/494.55 = 255.18/x
  3. Step 3: Cross multiply
    358.86x = 494.55 × 255.18
  4. Step 4: Simplify right side
    358.86x = 126,199.27
  5. Step 5: Solve for x
    x = 126,199.27/358.86
  6. Step 6: Final answer
    x = 351.67

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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.