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Finding the Fourth Proportional to 513.55, 765.45 and 484.37

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Solution

The fourth proportional to 513.55, 765.45 and 484.37 is: 721.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.55 : 765.45 = 484.37 : x
  2. Step 2: Convert to fraction form
    513.55/765.45 = 484.37/x
  3. Step 3: Cross multiply
    513.55x = 765.45 × 484.37
  4. Step 4: Simplify right side
    513.55x = 370,759.27
  5. Step 5: Solve for x
    x = 370,759.27/513.55
  6. Step 6: Final answer
    x = 721.95

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.