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Finding the Fourth Proportional to 444.66, 666.40 and 197.78

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Solution

The fourth proportional to 444.66, 666.40 and 197.78 is: 296.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.66 : 666.40 = 197.78 : x
  2. Step 2: Convert to fraction form
    444.66/666.40 = 197.78/x
  3. Step 3: Cross multiply
    444.66x = 666.40 × 197.78
  4. Step 4: Simplify right side
    444.66x = 131,800.59
  5. Step 5: Solve for x
    x = 131,800.59/444.66
  6. Step 6: Final answer
    x = 296.41

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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.