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Finding the Fourth Proportional to 421.92, 632.46 and 202.49

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Solution

The fourth proportional to 421.92, 632.46 and 202.49 is: 303.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.92 : 632.46 = 202.49 : x
  2. Step 2: Convert to fraction form
    421.92/632.46 = 202.49/x
  3. Step 3: Cross multiply
    421.92x = 632.46 × 202.49
  4. Step 4: Simplify right side
    421.92x = 128,063.66
  5. Step 5: Solve for x
    x = 128,063.66/421.92
  6. Step 6: Final answer
    x = 303.53

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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.