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Finding the Fourth Proportional to 454.80, 679.26 and 393.24

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Solution

The fourth proportional to 454.80, 679.26 and 393.24 is: 587.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.80 : 679.26 = 393.24 : x
  2. Step 2: Convert to fraction form
    454.80/679.26 = 393.24/x
  3. Step 3: Cross multiply
    454.80x = 679.26 × 393.24
  4. Step 4: Simplify right side
    454.80x = 267,112.20
  5. Step 5: Solve for x
    x = 267,112.20/454.80
  6. Step 6: Final answer
    x = 587.32

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.