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Finding the Fourth Proportional to 454.86, 682.26 and 130.20

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Solution

The fourth proportional to 454.86, 682.26 and 130.20 is: 195.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.86 : 682.26 = 130.20 : x
  2. Step 2: Convert to fraction form
    454.86/682.26 = 130.20/x
  3. Step 3: Cross multiply
    454.86x = 682.26 × 130.20
  4. Step 4: Simplify right side
    454.86x = 88,830.25
  5. Step 5: Solve for x
    x = 88,830.25/454.86
  6. Step 6: Final answer
    x = 195.29

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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.