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Finding the Fourth Proportional to 454.09, 681.19 and 129.47

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Solution

The fourth proportional to 454.09, 681.19 and 129.47 is: 194.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.09 : 681.19 = 129.47 : x
  2. Step 2: Convert to fraction form
    454.09/681.19 = 129.47/x
  3. Step 3: Cross multiply
    454.09x = 681.19 × 129.47
  4. Step 4: Simplify right side
    454.09x = 88,190.67
  5. Step 5: Solve for x
    x = 88,190.67/454.09
  6. Step 6: Final answer
    x = 194.21

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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.