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Finding the Fourth Proportional to 454.83, 681.22 and 210.85

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Solution

The fourth proportional to 454.83, 681.22 and 210.85 is: 315.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.83 : 681.22 = 210.85 : x
  2. Step 2: Convert to fraction form
    454.83/681.22 = 210.85/x
  3. Step 3: Cross multiply
    454.83x = 681.22 × 210.85
  4. Step 4: Simplify right side
    454.83x = 143,633.01
  5. Step 5: Solve for x
    x = 143,633.01/454.83
  6. Step 6: Final answer
    x = 315.79

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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.