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Finding the Fourth Proportional to 454.37, 680.48 and 388.99

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Solution

The fourth proportional to 454.37, 680.48 and 388.99 is: 582.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.37 : 680.48 = 388.99 : x
  2. Step 2: Convert to fraction form
    454.37/680.48 = 388.99/x
  3. Step 3: Cross multiply
    454.37x = 680.48 × 388.99
  4. Step 4: Simplify right side
    454.37x = 264,699.92
  5. Step 5: Solve for x
    x = 264,699.92/454.37
  6. Step 6: Final answer
    x = 582.56

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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.