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Finding the Fourth Proportional to 656.20, 904.98 and 481.96

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Solution

The fourth proportional to 656.20, 904.98 and 481.96 is: 664.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.20 : 904.98 = 481.96 : x
  2. Step 2: Convert to fraction form
    656.20/904.98 = 481.96/x
  3. Step 3: Cross multiply
    656.20x = 904.98 × 481.96
  4. Step 4: Simplify right side
    656.20x = 436,164.16
  5. Step 5: Solve for x
    x = 436,164.16/656.20
  6. Step 6: Final answer
    x = 664.68

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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.