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Finding the Fourth Proportional to 444.60, 666.88 and 213.65

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Solution

The fourth proportional to 444.60, 666.88 and 213.65 is: 320.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.60 : 666.88 = 213.65 : x
  2. Step 2: Convert to fraction form
    444.60/666.88 = 213.65/x
  3. Step 3: Cross multiply
    444.60x = 666.88 × 213.65
  4. Step 4: Simplify right side
    444.60x = 142,478.91
  5. Step 5: Solve for x
    x = 142,478.91/444.60
  6. Step 6: Final answer
    x = 320.47

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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.