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Finding the Fourth Proportional to 451.88, 678.02 and 220.98

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Solution

The fourth proportional to 451.88, 678.02 and 220.98 is: 331.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.88 : 678.02 = 220.98 : x
  2. Step 2: Convert to fraction form
    451.88/678.02 = 220.98/x
  3. Step 3: Cross multiply
    451.88x = 678.02 × 220.98
  4. Step 4: Simplify right side
    451.88x = 149,828.86
  5. Step 5: Solve for x
    x = 149,828.86/451.88
  6. Step 6: Final answer
    x = 331.57

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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.