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Finding the Fourth Proportional to 443.96, 611.18 and 386.36

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Solution

The fourth proportional to 443.96, 611.18 and 386.36 is: 531.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.96 : 611.18 = 386.36 : x
  2. Step 2: Convert to fraction form
    443.96/611.18 = 386.36/x
  3. Step 3: Cross multiply
    443.96x = 611.18 × 386.36
  4. Step 4: Simplify right side
    443.96x = 236,135.50
  5. Step 5: Solve for x
    x = 236,135.50/443.96
  6. Step 6: Final answer
    x = 531.88

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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.