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Finding the Fourth Proportional to 643.96, 965.86 and 227.42

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Solution

The fourth proportional to 643.96, 965.86 and 227.42 is: 341.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.96 : 965.86 = 227.42 : x
  2. Step 2: Convert to fraction form
    643.96/965.86 = 227.42/x
  3. Step 3: Cross multiply
    643.96x = 965.86 × 227.42
  4. Step 4: Simplify right side
    643.96x = 219,655.88
  5. Step 5: Solve for x
    x = 219,655.88/643.96
  6. Step 6: Final answer
    x = 341.10

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1.5x scale

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.