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Finding the Fourth Proportional to 454.88, 680.42 and 386.30

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Solution

The fourth proportional to 454.88, 680.42 and 386.30 is: 577.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.88 : 680.42 = 386.30 : x
  2. Step 2: Convert to fraction form
    454.88/680.42 = 386.30/x
  3. Step 3: Cross multiply
    454.88x = 680.42 × 386.30
  4. Step 4: Simplify right side
    454.88x = 262,846.25
  5. Step 5: Solve for x
    x = 262,846.25/454.88
  6. Step 6: Final answer
    x = 577.84

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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.