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Finding the Fourth Proportional to 455.21, 682.88 and 146.96

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Solution

The fourth proportional to 455.21, 682.88 and 146.96 is: 220.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.21 : 682.88 = 146.96 : x
  2. Step 2: Convert to fraction form
    455.21/682.88 = 146.96/x
  3. Step 3: Cross multiply
    455.21x = 682.88 × 146.96
  4. Step 4: Simplify right side
    455.21x = 100,356.04
  5. Step 5: Solve for x
    x = 100,356.04/455.21
  6. Step 6: Final answer
    x = 220.46

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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.