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Finding the Fourth Proportional to 329.28, 493.20 and 207.24

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Solution

The fourth proportional to 329.28, 493.20 and 207.24 is: 310.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.28 : 493.20 = 207.24 : x
  2. Step 2: Convert to fraction form
    329.28/493.20 = 207.24/x
  3. Step 3: Cross multiply
    329.28x = 493.20 × 207.24
  4. Step 4: Simplify right side
    329.28x = 102,210.77
  5. Step 5: Solve for x
    x = 102,210.77/329.28
  6. Step 6: Final answer
    x = 310.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.