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Finding the Fourth Proportional to 522.05, 781.11 and 347.90

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Solution

The fourth proportional to 522.05, 781.11 and 347.90 is: 520.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.05 : 781.11 = 347.90 : x
  2. Step 2: Convert to fraction form
    522.05/781.11 = 347.90/x
  3. Step 3: Cross multiply
    522.05x = 781.11 × 347.90
  4. Step 4: Simplify right side
    522.05x = 271,744.26
  5. Step 5: Solve for x
    x = 271,744.26/522.05
  6. Step 6: Final answer
    x = 520.54

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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.