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Finding the Fourth Proportional to 645.27, 967.41 and 320.39

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Solution

The fourth proportional to 645.27, 967.41 and 320.39 is: 480.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.27 : 967.41 = 320.39 : x
  2. Step 2: Convert to fraction form
    645.27/967.41 = 320.39/x
  3. Step 3: Cross multiply
    645.27x = 967.41 × 320.39
  4. Step 4: Simplify right side
    645.27x = 309,943.65
  5. Step 5: Solve for x
    x = 309,943.65/645.27
  6. Step 6: Final answer
    x = 480.33

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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.