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Finding the Fourth Proportional to 645.39, 967.68 and 332.64

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Solution

The fourth proportional to 645.39, 967.68 and 332.64 is: 498.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.39 : 967.68 = 332.64 : x
  2. Step 2: Convert to fraction form
    645.39/967.68 = 332.64/x
  3. Step 3: Cross multiply
    645.39x = 967.68 × 332.64
  4. Step 4: Simplify right side
    645.39x = 321,889.08
  5. Step 5: Solve for x
    x = 321,889.08/645.39
  6. Step 6: Final answer
    x = 498.75

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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.