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Finding the Fourth Proportional to 494.20, 741.30 and 455.80

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Solution

The fourth proportional to 494.20, 741.30 and 455.80 is: 683.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.20 : 741.30 = 455.80 : x
  2. Step 2: Convert to fraction form
    494.20/741.30 = 455.80/x
  3. Step 3: Cross multiply
    494.20x = 741.30 × 455.80
  4. Step 4: Simplify right side
    494.20x = 337,884.54
  5. Step 5: Solve for x
    x = 337,884.54/494.20
  6. Step 6: Final answer
    x = 683.70

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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.