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Finding the Fourth Proportional to 299.40, 450.96 and 283.20

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Solution

The fourth proportional to 299.40, 450.96 and 283.20 is: 426.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    299.40 : 450.96 = 283.20 : x
  2. Step 2: Convert to fraction form
    299.40/450.96 = 283.20/x
  3. Step 3: Cross multiply
    299.40x = 450.96 × 283.20
  4. Step 4: Simplify right side
    299.40x = 127,711.87
  5. Step 5: Solve for x
    x = 127,711.87/299.40
  6. Step 6: Final answer
    x = 426.56

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.