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Finding the Fourth Proportional to 551.40, 825.93 and 513.42

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Solution

The fourth proportional to 551.40, 825.93 and 513.42 is: 769.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.40 : 825.93 = 513.42 : x
  2. Step 2: Convert to fraction form
    551.40/825.93 = 513.42/x
  3. Step 3: Cross multiply
    551.40x = 825.93 × 513.42
  4. Step 4: Simplify right side
    551.40x = 424,048.98
  5. Step 5: Solve for x
    x = 424,048.98/551.40
  6. Step 6: Final answer
    x = 769.04

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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.