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Finding the Fourth Proportional to 513.80, 770.70 and 294.20

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Solution

The fourth proportional to 513.80, 770.70 and 294.20 is: 441.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.80 : 770.70 = 294.20 : x
  2. Step 2: Convert to fraction form
    513.80/770.70 = 294.20/x
  3. Step 3: Cross multiply
    513.80x = 770.70 × 294.20
  4. Step 4: Simplify right side
    513.80x = 226,739.94
  5. Step 5: Solve for x
    x = 226,739.94/513.80
  6. Step 6: Final answer
    x = 441.30

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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.