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Finding the Fourth Proportional to 454.09, 681.14 and 210.55

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Solution

The fourth proportional to 454.09, 681.14 and 210.55 is: 315.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.09 : 681.14 = 210.55 : x
  2. Step 2: Convert to fraction form
    454.09/681.14 = 210.55/x
  3. Step 3: Cross multiply
    454.09x = 681.14 × 210.55
  4. Step 4: Simplify right side
    454.09x = 143,414.03
  5. Step 5: Solve for x
    x = 143,414.03/454.09
  6. Step 6: Final answer
    x = 315.83

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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.