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Finding the Fourth Proportional to 632.21, 872.42 and 352.45

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Solution

The fourth proportional to 632.21, 872.42 and 352.45 is: 486.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.21 : 872.42 = 352.45 : x
  2. Step 2: Convert to fraction form
    632.21/872.42 = 352.45/x
  3. Step 3: Cross multiply
    632.21x = 872.42 × 352.45
  4. Step 4: Simplify right side
    632.21x = 307,485.74
  5. Step 5: Solve for x
    x = 307,485.74/632.21
  6. Step 6: Final answer
    x = 486.37

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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.