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Finding the Fourth Proportional to 334.21, 501.31 and 90.73

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Solution

The fourth proportional to 334.21, 501.31 and 90.73 is: 136.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    334.21 : 501.31 = 90.73 : x
  2. Step 2: Convert to fraction form
    334.21/501.31 = 90.73/x
  3. Step 3: Cross multiply
    334.21x = 501.31 × 90.73
  4. Step 4: Simplify right side
    334.21x = 45,485.54
  5. Step 5: Solve for x
    x = 45,485.54/334.21
  6. Step 6: Final answer
    x = 136.10

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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.