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Finding the Fourth Proportional to 645.06, 967.71 and 212.22

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Solution

The fourth proportional to 645.06, 967.71 and 212.22 is: 318.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.06 : 967.71 = 212.22 : x
  2. Step 2: Convert to fraction form
    645.06/967.71 = 212.22/x
  3. Step 3: Cross multiply
    645.06x = 967.71 × 212.22
  4. Step 4: Simplify right side
    645.06x = 205,368.21
  5. Step 5: Solve for x
    x = 205,368.21/645.06
  6. Step 6: Final answer
    x = 318.37

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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.