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Finding the Fourth Proportional to 367.88, 551.81 and 265.21

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Solution

The fourth proportional to 367.88, 551.81 and 265.21 is: 397.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    367.88 : 551.81 = 265.21 : x
  2. Step 2: Convert to fraction form
    367.88/551.81 = 265.21/x
  3. Step 3: Cross multiply
    367.88x = 551.81 × 265.21
  4. Step 4: Simplify right side
    367.88x = 146,344.81
  5. Step 5: Solve for x
    x = 146,344.81/367.88
  6. Step 6: Final answer
    x = 397.81

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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.