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Finding the Fourth Proportional to 522.17, 783.26 and 213.81

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Solution

The fourth proportional to 522.17, 783.26 and 213.81 is: 320.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.17 : 783.26 = 213.81 : x
  2. Step 2: Convert to fraction form
    522.17/783.26 = 213.81/x
  3. Step 3: Cross multiply
    522.17x = 783.26 × 213.81
  4. Step 4: Simplify right side
    522.17x = 167,469.36
  5. Step 5: Solve for x
    x = 167,469.36/522.17
  6. Step 6: Final answer
    x = 320.72

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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.