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Finding the Fourth Proportional to 645.08, 967.01 and 279.36

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Solution

The fourth proportional to 645.08, 967.01 and 279.36 is: 418.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.08 : 967.01 = 279.36 : x
  2. Step 2: Convert to fraction form
    645.08/967.01 = 279.36/x
  3. Step 3: Cross multiply
    645.08x = 967.01 × 279.36
  4. Step 4: Simplify right side
    645.08x = 270,142.52
  5. Step 5: Solve for x
    x = 270,142.52/645.08
  6. Step 6: Final answer
    x = 418.78

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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.