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Finding the Fourth Proportional to 466.81, 644.30 and 280.31

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Solution

The fourth proportional to 466.81, 644.30 and 280.31 is: 386.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    466.81 : 644.30 = 280.31 : x
  2. Step 2: Convert to fraction form
    466.81/644.30 = 280.31/x
  3. Step 3: Cross multiply
    466.81x = 644.30 × 280.31
  4. Step 4: Simplify right side
    466.81x = 180,603.73
  5. Step 5: Solve for x
    x = 180,603.73/466.81
  6. Step 6: Final answer
    x = 386.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.