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Finding the Fourth Proportional to 443.43, 611.78 and 266.40

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Solution

The fourth proportional to 443.43, 611.78 and 266.40 is: 367.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.43 : 611.78 = 266.40 : x
  2. Step 2: Convert to fraction form
    443.43/611.78 = 266.40/x
  3. Step 3: Cross multiply
    443.43x = 611.78 × 266.40
  4. Step 4: Simplify right side
    443.43x = 162,976.86
  5. Step 5: Solve for x
    x = 162,976.86/443.43
  6. Step 6: Final answer
    x = 367.54

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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.