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Finding the Fourth Proportional to 350.70, 526.20 and 220.80

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Solution

The fourth proportional to 350.70, 526.20 and 220.80 is: 331.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    350.70 : 526.20 = 220.80 : x
  2. Step 2: Convert to fraction form
    350.70/526.20 = 220.80/x
  3. Step 3: Cross multiply
    350.70x = 526.20 × 220.80
  4. Step 4: Simplify right side
    350.70x = 116,184.96
  5. Step 5: Solve for x
    x = 116,184.96/350.70
  6. Step 6: Final answer
    x = 331.29

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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.