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Finding the Fourth Proportional to 443.10, 611.78 and 406.12

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Solution

The fourth proportional to 443.10, 611.78 and 406.12 is: 560.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.10 : 611.78 = 406.12 : x
  2. Step 2: Convert to fraction form
    443.10/611.78 = 406.12/x
  3. Step 3: Cross multiply
    443.10x = 611.78 × 406.12
  4. Step 4: Simplify right side
    443.10x = 248,456.09
  5. Step 5: Solve for x
    x = 248,456.09/443.10
  6. Step 6: Final answer
    x = 560.72

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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.