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Finding the Fourth Proportional to 452.43, 678.77 and 221.45

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Solution

The fourth proportional to 452.43, 678.77 and 221.45 is: 332.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.43 : 678.77 = 221.45 : x
  2. Step 2: Convert to fraction form
    452.43/678.77 = 221.45/x
  3. Step 3: Cross multiply
    452.43x = 678.77 × 221.45
  4. Step 4: Simplify right side
    452.43x = 150,313.89
  5. Step 5: Solve for x
    x = 150,313.89/452.43
  6. Step 6: Final answer
    x = 332.24

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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.