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Finding the Fourth Proportional to 632.45, 948.40 and 199.64

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Solution

The fourth proportional to 632.45, 948.40 and 199.64 is: 299.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.45 : 948.40 = 199.64 : x
  2. Step 2: Convert to fraction form
    632.45/948.40 = 199.64/x
  3. Step 3: Cross multiply
    632.45x = 948.40 × 199.64
  4. Step 4: Simplify right side
    632.45x = 189,338.58
  5. Step 5: Solve for x
    x = 189,338.58/632.45
  6. Step 6: Final answer
    x = 299.37

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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.