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Finding the Fourth Proportional to 466.84, 644.19 and 280.30

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Solution

The fourth proportional to 466.84, 644.19 and 280.30 is: 386.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    466.84 : 644.19 = 280.30 : x
  2. Step 2: Convert to fraction form
    466.84/644.19 = 280.30/x
  3. Step 3: Cross multiply
    466.84x = 644.19 × 280.30
  4. Step 4: Simplify right side
    466.84x = 180,566.46
  5. Step 5: Solve for x
    x = 180,566.46/466.84
  6. Step 6: Final answer
    x = 386.78

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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.