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Finding the Fourth Proportional to 514.15, 770.97 and 221.62

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Solution

The fourth proportional to 514.15, 770.97 and 221.62 is: 332.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.15 : 770.97 = 221.62 : x
  2. Step 2: Convert to fraction form
    514.15/770.97 = 221.62/x
  3. Step 3: Cross multiply
    514.15x = 770.97 × 221.62
  4. Step 4: Simplify right side
    514.15x = 170,862.37
  5. Step 5: Solve for x
    x = 170,862.37/514.15
  6. Step 6: Final answer
    x = 332.32

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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.