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Finding the Fourth Proportional to 522.75, 720.84 and 389.37

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Solution

The fourth proportional to 522.75, 720.84 and 389.37 is: 536.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.75 : 720.84 = 389.37 : x
  2. Step 2: Convert to fraction form
    522.75/720.84 = 389.37/x
  3. Step 3: Cross multiply
    522.75x = 720.84 × 389.37
  4. Step 4: Simplify right side
    522.75x = 280,673.47
  5. Step 5: Solve for x
    x = 280,673.47/522.75
  6. Step 6: Final answer
    x = 536.92

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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.