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Finding the Fourth Proportional to 446.21, 667.82 and 429.17

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Solution

The fourth proportional to 446.21, 667.82 and 429.17 is: 642.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.21 : 667.82 = 429.17 : x
  2. Step 2: Convert to fraction form
    446.21/667.82 = 429.17/x
  3. Step 3: Cross multiply
    446.21x = 667.82 × 429.17
  4. Step 4: Simplify right side
    446.21x = 286,606.16
  5. Step 5: Solve for x
    x = 286,606.16/446.21
  6. Step 6: Final answer
    x = 642.31

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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.