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Finding the Fourth Proportional to 444.18, 666.21 and 281.50

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Solution

The fourth proportional to 444.18, 666.21 and 281.50 is: 422.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.18 : 666.21 = 281.50 : x
  2. Step 2: Convert to fraction form
    444.18/666.21 = 281.50/x
  3. Step 3: Cross multiply
    444.18x = 666.21 × 281.50
  4. Step 4: Simplify right side
    444.18x = 187,538.12
  5. Step 5: Solve for x
    x = 187,538.12/444.18
  6. Step 6: Final answer
    x = 422.21

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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.