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Finding the Fourth Proportional to 446.13, 668.18 and 438.64

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Solution

The fourth proportional to 446.13, 668.18 and 438.64 is: 656.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.13 : 668.18 = 438.64 : x
  2. Step 2: Convert to fraction form
    446.13/668.18 = 438.64/x
  3. Step 3: Cross multiply
    446.13x = 668.18 × 438.64
  4. Step 4: Simplify right side
    446.13x = 293,089.90
  5. Step 5: Solve for x
    x = 293,089.90/446.13
  6. Step 6: Final answer
    x = 656.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.