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Finding the Fourth Proportional to 431.92, 644.18 and 367.34

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Solution

The fourth proportional to 431.92, 644.18 and 367.34 is: 547.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    431.92 : 644.18 = 367.34 : x
  2. Step 2: Convert to fraction form
    431.92/644.18 = 367.34/x
  3. Step 3: Cross multiply
    431.92x = 644.18 × 367.34
  4. Step 4: Simplify right side
    431.92x = 236,633.08
  5. Step 5: Solve for x
    x = 236,633.08/431.92
  6. Step 6: Final answer
    x = 547.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.