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Finding the Fourth Proportional to 466.80, 644.40 and 280.32

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Solution

The fourth proportional to 466.80, 644.40 and 280.32 is: 386.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    466.80 : 644.40 = 280.32 : x
  2. Step 2: Convert to fraction form
    466.80/644.40 = 280.32/x
  3. Step 3: Cross multiply
    466.80x = 644.40 × 280.32
  4. Step 4: Simplify right side
    466.80x = 180,638.21
  5. Step 5: Solve for x
    x = 180,638.21/466.80
  6. Step 6: Final answer
    x = 386.97

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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.