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Finding the Fourth Proportional to 450.72, 622 and 293.40

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Solution

The fourth proportional to 450.72, 622 and 293.40 is: 404.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.72 : 622 = 293.40 : x
  2. Step 2: Convert to fraction form
    450.72/622 = 293.40/x
  3. Step 3: Cross multiply
    450.72x = 622 × 293.40
  4. Step 4: Simplify right side
    450.72x = 182,494.80
  5. Step 5: Solve for x
    x = 182,494.80/450.72
  6. Step 6: Final answer
    x = 404.90

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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.