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Finding the Fourth Proportional to 358.08, 493.20 and 329.28

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Solution

The fourth proportional to 358.08, 493.20 and 329.28 is: 453.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.08 : 493.20 = 329.28 : x
  2. Step 2: Convert to fraction form
    358.08/493.20 = 329.28/x
  3. Step 3: Cross multiply
    358.08x = 493.20 × 329.28
  4. Step 4: Simplify right side
    358.08x = 162,400.90
  5. Step 5: Solve for x
    x = 162,400.90/358.08
  6. Step 6: Final answer
    x = 453.53

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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.