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Finding the Fourth Proportional to 522.21, 781.29 and 359.40

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Solution

The fourth proportional to 522.21, 781.29 and 359.40 is: 537.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.21 : 781.29 = 359.40 : x
  2. Step 2: Convert to fraction form
    522.21/781.29 = 359.40/x
  3. Step 3: Cross multiply
    522.21x = 781.29 × 359.40
  4. Step 4: Simplify right side
    522.21x = 280,795.63
  5. Step 5: Solve for x
    x = 280,795.63/522.21
  6. Step 6: Final answer
    x = 537.71

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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.