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Finding the Fourth Proportional to 551.02, 825.72 and 345

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Solution

The fourth proportional to 551.02, 825.72 and 345 is: 516.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.02 : 825.72 = 345 : x
  2. Step 2: Convert to fraction form
    551.02/825.72 = 345/x
  3. Step 3: Cross multiply
    551.02x = 825.72 × 345
  4. Step 4: Simplify right side
    551.02x = 284,873.40
  5. Step 5: Solve for x
    x = 284,873.40/551.02
  6. Step 6: Final answer
    x = 516.99

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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.