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Finding the Fourth Proportional to 389.99, 536.49 and 352.73

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Solution

The fourth proportional to 389.99, 536.49 and 352.73 is: 485.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.99 : 536.49 = 352.73 : x
  2. Step 2: Convert to fraction form
    389.99/536.49 = 352.73/x
  3. Step 3: Cross multiply
    389.99x = 536.49 × 352.73
  4. Step 4: Simplify right side
    389.99x = 189,233.44
  5. Step 5: Solve for x
    x = 189,233.44/389.99
  6. Step 6: Final answer
    x = 485.23

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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.