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Finding the Fourth Proportional to 645.12, 967.67 and 320.71

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Solution

The fourth proportional to 645.12, 967.67 and 320.71 is: 481.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.12 : 967.67 = 320.71 : x
  2. Step 2: Convert to fraction form
    645.12/967.67 = 320.71/x
  3. Step 3: Cross multiply
    645.12x = 967.67 × 320.71
  4. Step 4: Simplify right side
    645.12x = 310,341.45
  5. Step 5: Solve for x
    x = 310,341.45/645.12
  6. Step 6: Final answer
    x = 481.06

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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.