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Finding the Fourth Proportional to 522.85, 721.41 and 301.81

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Solution

The fourth proportional to 522.85, 721.41 and 301.81 is: 416.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.85 : 721.41 = 301.81 : x
  2. Step 2: Convert to fraction form
    522.85/721.41 = 301.81/x
  3. Step 3: Cross multiply
    522.85x = 721.41 × 301.81
  4. Step 4: Simplify right side
    522.85x = 217,728.75
  5. Step 5: Solve for x
    x = 217,728.75/522.85
  6. Step 6: Final answer
    x = 416.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.