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Finding the Fourth Proportional to 513.32, 770.03 and 220.85

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Solution

The fourth proportional to 513.32, 770.03 and 220.85 is: 331.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.32 : 770.03 = 220.85 : x
  2. Step 2: Convert to fraction form
    513.32/770.03 = 220.85/x
  3. Step 3: Cross multiply
    513.32x = 770.03 × 220.85
  4. Step 4: Simplify right side
    513.32x = 170,061.13
  5. Step 5: Solve for x
    x = 170,061.13/513.32
  6. Step 6: Final answer
    x = 331.30

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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.