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Finding the Fourth Proportional to 444.29, 666.32 and 212.72

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Solution

The fourth proportional to 444.29, 666.32 and 212.72 is: 319.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.29 : 666.32 = 212.72 : x
  2. Step 2: Convert to fraction form
    444.29/666.32 = 212.72/x
  3. Step 3: Cross multiply
    444.29x = 666.32 × 212.72
  4. Step 4: Simplify right side
    444.29x = 141,739.59
  5. Step 5: Solve for x
    x = 141,739.59/444.29
  6. Step 6: Final answer
    x = 319.02

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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.