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Finding the Fourth Proportional to 443.43, 663.90 and 288.97

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Solution

The fourth proportional to 443.43, 663.90 and 288.97 is: 432.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.43 : 663.90 = 288.97 : x
  2. Step 2: Convert to fraction form
    443.43/663.90 = 288.97/x
  3. Step 3: Cross multiply
    443.43x = 663.90 × 288.97
  4. Step 4: Simplify right side
    443.43x = 191,847.18
  5. Step 5: Solve for x
    x = 191,847.18/443.43
  6. Step 6: Final answer
    x = 432.64

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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.