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Finding the Fourth Proportional to 454.12, 681.13 and 210.49

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Solution

The fourth proportional to 454.12, 681.13 and 210.49 is: 315.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.12 : 681.13 = 210.49 : x
  2. Step 2: Convert to fraction form
    454.12/681.13 = 210.49/x
  3. Step 3: Cross multiply
    454.12x = 681.13 × 210.49
  4. Step 4: Simplify right side
    454.12x = 143,371.05
  5. Step 5: Solve for x
    x = 143,371.05/454.12
  6. Step 6: Final answer
    x = 315.71

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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.