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Finding the Fourth Proportional to 451.52, 677.21 and 208.00

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Solution

The fourth proportional to 451.52, 677.21 and 208.00 is: 311.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.52 : 677.21 = 208.00 : x
  2. Step 2: Convert to fraction form
    451.52/677.21 = 208.00/x
  3. Step 3: Cross multiply
    451.52x = 677.21 × 208.00
  4. Step 4: Simplify right side
    451.52x = 140,855.25
  5. Step 5: Solve for x
    x = 140,855.25/451.52
  6. Step 6: Final answer
    x = 311.96

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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.