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Finding the Fourth Proportional to 454.60, 680.30 and 416.20

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Solution

The fourth proportional to 454.60, 680.30 and 416.20 is: 622.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.60 : 680.30 = 416.20 : x
  2. Step 2: Convert to fraction form
    454.60/680.30 = 416.20/x
  3. Step 3: Cross multiply
    454.60x = 680.30 × 416.20
  4. Step 4: Simplify right side
    454.60x = 283,140.86
  5. Step 5: Solve for x
    x = 283,140.86/454.60
  6. Step 6: Final answer
    x = 622.84

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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.