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Finding the Fourth Proportional to 644.93, 967.37 and 212.07

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Solution

The fourth proportional to 644.93, 967.37 and 212.07 is: 318.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.93 : 967.37 = 212.07 : x
  2. Step 2: Convert to fraction form
    644.93/967.37 = 212.07/x
  3. Step 3: Cross multiply
    644.93x = 967.37 × 212.07
  4. Step 4: Simplify right side
    644.93x = 205,149.10
  5. Step 5: Solve for x
    x = 205,149.10/644.93
  6. Step 6: Final answer
    x = 318.10

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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.