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Finding the Fourth Proportional to 454.10, 680.45 and 338.00

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Solution

The fourth proportional to 454.10, 680.45 and 338.00 is: 506.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.10 : 680.45 = 338.00 : x
  2. Step 2: Convert to fraction form
    454.10/680.45 = 338.00/x
  3. Step 3: Cross multiply
    454.10x = 680.45 × 338.00
  4. Step 4: Simplify right side
    454.10x = 229,987.01
  5. Step 5: Solve for x
    x = 229,987.01/454.10
  6. Step 6: Final answer
    x = 506.47

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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.