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Finding the Fourth Proportional to 522.09, 783.11 and 213.85

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Solution

The fourth proportional to 522.09, 783.11 and 213.85 is: 320.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.09 : 783.11 = 213.85 : x
  2. Step 2: Convert to fraction form
    522.09/783.11 = 213.85/x
  3. Step 3: Cross multiply
    522.09x = 783.11 × 213.85
  4. Step 4: Simplify right side
    522.09x = 167,468.07
  5. Step 5: Solve for x
    x = 167,468.07/522.09
  6. Step 6: Final answer
    x = 320.76

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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.