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Finding the Fourth Proportional to 444.30, 666.46 and 136.21

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Solution

The fourth proportional to 444.30, 666.46 and 136.21 is: 204.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.30 : 666.46 = 136.21 : x
  2. Step 2: Convert to fraction form
    444.30/666.46 = 136.21/x
  3. Step 3: Cross multiply
    444.30x = 666.46 × 136.21
  4. Step 4: Simplify right side
    444.30x = 90,776.51
  5. Step 5: Solve for x
    x = 90,776.51/444.30
  6. Step 6: Final answer
    x = 204.31

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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.