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Finding the Fourth Proportional to 468, 648.60 and 460.80

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Solution

The fourth proportional to 468, 648.60 and 460.80 is: 638.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    468 : 648.60 = 460.80 : x
  2. Step 2: Convert to fraction form
    468/648.60 = 460.80/x
  3. Step 3: Cross multiply
    468x = 648.60 × 460.80
  4. Step 4: Simplify right side
    468x = 298,874.88
  5. Step 5: Solve for x
    x = 298,874.88/468
  6. Step 6: Final answer
    x = 638.62

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.