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Finding the Fourth Proportional to 513.50, 769.71 and 328.53

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Solution

The fourth proportional to 513.50, 769.71 and 328.53 is: 492.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.50 : 769.71 = 328.53 : x
  2. Step 2: Convert to fraction form
    513.50/769.71 = 328.53/x
  3. Step 3: Cross multiply
    513.50x = 769.71 × 328.53
  4. Step 4: Simplify right side
    513.50x = 252,870.77
  5. Step 5: Solve for x
    x = 252,870.77/513.50
  6. Step 6: Final answer
    x = 492.45

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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.