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Finding the Fourth Proportional to 357, 534.30 and 220.14

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Solution

The fourth proportional to 357, 534.30 and 220.14 is: 329.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    357 : 534.30 = 220.14 : x
  2. Step 2: Convert to fraction form
    357/534.30 = 220.14/x
  3. Step 3: Cross multiply
    357x = 534.30 × 220.14
  4. Step 4: Simplify right side
    357x = 117,620.80
  5. Step 5: Solve for x
    x = 117,620.80/357
  6. Step 6: Final answer
    x = 329.47

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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.