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Finding the Fourth Proportional to 421.84, 629.71 and 364.43

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Solution

The fourth proportional to 421.84, 629.71 and 364.43 is: 544.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.84 : 629.71 = 364.43 : x
  2. Step 2: Convert to fraction form
    421.84/629.71 = 364.43/x
  3. Step 3: Cross multiply
    421.84x = 629.71 × 364.43
  4. Step 4: Simplify right side
    421.84x = 229,489.11
  5. Step 5: Solve for x
    x = 229,489.11/421.84
  6. Step 6: Final answer
    x = 544.02

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.