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Finding the Fourth Proportional to 644.94, 967.62 and 212.16

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Solution

The fourth proportional to 644.94, 967.62 and 212.16 is: 318.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.94 : 967.62 = 212.16 : x
  2. Step 2: Convert to fraction form
    644.94/967.62 = 212.16/x
  3. Step 3: Cross multiply
    644.94x = 967.62 × 212.16
  4. Step 4: Simplify right side
    644.94x = 205,290.26
  5. Step 5: Solve for x
    x = 205,290.26/644.94
  6. Step 6: Final answer
    x = 318.31

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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.